Cisco ONS 15327, ONS 15454, ONS 15454 SDH, and ONS 15600 Malformed Packet Vulnerabilities

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Cisco VPN Client Multiple Vulnerabilities

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Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability

May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and fixed after the Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability...

Cisco IOS XR Software Secure Boot Bypass Vulnerability

A vulnerability in the boot process of Cisco IOS XR Software could allow an authenticated, local attacker with high privileges to bypass the Secure Boot functionality and load unverified software on an affected device. To exploit this vulnerability, the attacker must have root-system privileges o...

Cisco Unified Contact Center Management Portal Stored Cross-Site Scripting Vulnerability

A vulnerability in the web-based management interface of Cisco Unified Contact Center Management Portal Unified CCMP could allow an authenticated, remote attacker with low privileges to conduct a stored cross-site scripting XSS attack against a user of the interface. This vulnerability exists...

Cisco IOS XR Software Segment Routing for Intermediate System-to-Intermediate System Denial of Service Vulnerability

A vulnerability in the segment routing feature for the Intermediate System-to-Intermediate System IS-IS protocol of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service DoS condition on an affected device. This vulnerability is due to insufficient...

Cisco Adaptive Security Appliance and Firepower Threat Defense Software Authorization Bypass Vulnerability

A vulnerability in the implementation of SAML 2.0 single sign-on SSO for remote access VPN services in Cisco Adaptive Security Appliance ASA Software and Cisco Firepower Threat Defense FTD Software could allow an authenticated, remote attacker to successfully establish a VPN session on an affecte...

Cisco Nexus Dashboard Privilege Escalation Vulnerability

A vulnerability in Cisco Nexus Dashboard could allow an authenticated, local attacker with valid rescue-user credentials to elevate privileges to root on an affected device. This vulnerability is due to insufficient protections for a sensitive access token. An attacker could exploit this...

Cisco Aironet Access Point Software Resource Exhaustion Denial of Service Vulnerability

A vulnerability in the handling of encrypted wireless frames of Cisco Aironet Access Point AP Software could allow an unauthenticated, adjacent attacker to cause a denial of service DoS condition on the affected device. This vulnerability is due to incomplete cleanup of resources when dropping...

Cisco Duo Authentication for Windows Logon and RDP Information Disclosure Vulnerability

A vulnerability in the logging component of Cisco Duo Authentication for Windows Logon and RDP could allow an authenticated, local attacker to view sensitive information in clear text on an affected system. This vulnerability is due to improper storage of an unencrypted registry key in certain...

Cisco Identity Services Engine Device Credential Information Disclosure Vulnerability

A vulnerability in the web-based management interface of Cisco Identity Services Engine ISE could allow an authenticated, remote attacker to access sensitive information. This vulnerability is due to the improper storage of sensitive information within the web-based management interface. An...

Cisco Expressway Series and Cisco TelePresence Video Communication Server Privilege Escalation Vulnerabilities

Multiple vulnerabilities in Cisco Expressway Series and Cisco TelePresence Video Communication Server VCS could allow an authenticated attacker with Administrator-level read-only credentials to elevate their privileges to Administrator with read-write credentials on an affected system. Note: "Cis...

Cisco Small Business 200, 300, and 500 Series Switches Web-Based Management Stored Cross-Site Scripting Vulnerability

A vulnerability in the web-based management interface of Cisco Small Business 200 Series Smart Switches, Cisco Small Business 300 Series Managed Switches, and Cisco Small Business 500 Series Stackable Managed Switches could allow an authenticated, remote attacker to conduct a stored cross-site...

Cisco Modeling Labs External Authentication Bypass Vulnerability

A vulnerability in the external authentication mechanism of Cisco Modeling Labs could allow an unauthenticated, remote attacker to access the web interface with administrative privileges. This vulnerability is due to the improper handling of certain messages that are returned by the associated...

Cisco Identity Services Engine Insufficient Access Control Vulnerability

A vulnerability in the web-based management interface of Cisco Identity Services Engine ISE could allow an authenticated, remote attacker to bypass authorization and access system files. This vulnerability is due to improper access control in the web-based management interface of an affected...

Cisco IOS XE Software for Embedded Wireless Controllers on Catalyst 9100 Series Access Points UDP Processing Denial of Service Vulnerability

A vulnerability in the UDP processing functionality of Cisco IOS XE Software for Embedded Wireless Controllers on Catalyst 9100 Series Access Points could allow an unauthenticated, remote attacker to cause a denial of service DoS condition. This vulnerability is due to the improper processing of...

Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers IPSec VPN Server Authentication Bypass Vulnerability

A vulnerability in the IPSec VPN Server authentication functionality of Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers could allow an unauthenticated, remote attacker to bypass authentication controls and access the IPSec VPN network. This vulnerability is due to the improper...

Cisco Webex Video Mesh Arbitrary Site Redirection Vulnerability

A vulnerability in the web-based management interface of Cisco Webex Video Mesh could allow an unauthenticated, remote attacker to redirect a user to a malicious web page. This vulnerability is due to improper input validation of the URL parameters in an HTTP request. An attacker could exploit th...

Cisco Webex Video Mesh Cross-Site Scripting Vulnerability

A vulnerability in Cisco Webex Video Mesh could allow an unauthenticated, remote attacker to conduct a cross-site scripting XSS attack against a user of the interface. This vulnerability is due to insufficient validation of user-supplied input by the web-based management interface. An attacker...

Cisco TelePresence Collaboration Endpoint and RoomOS Software Denial of Service Vulnerability

It was previously published that a vulnerability in the memory management of Cisco TelePresence Collaboration Endpoint CE Software and Cisco RoomOS Software could allow an authenticated, local attacker to corrupt a shared memory segment, resulting in a denial of service DoS condition. This...

Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Remote Code Execution Vulnerability

A vulnerability in the Control and Provisioning of Wireless Access Points CAPWAP protocol processing of Cisco IOS XE Software for Cisco Catalyst 9000 Family Wireless Controllers could allow an unauthenticated, remote attacker to execute arbitrary code with administrative privileges or cause a...

Cisco Intersight Virtual Appliance Vulnerabilities

Multiple vulnerabilities in the web-based management interface of Cisco Intersight Virtual Appliance could allow an authenticated, remote attacker to conduct a path traversal or command injection attack on an affected system. These vulnerabilities are due to insufficient input validation. An...

Multiple Cisco Products Snort TCP Fast Open File Policy Bypass Vulnerability

Multiple Cisco products are affected by a vulnerability with TCP Fast Open TFO when used in conjunction with the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. The vulnerability is due to incorrect detection of the HTTP...

Cisco Unified Communications Manager IM and Presence Service Denial of Service Vulnerability

A vulnerability in Cisco Unified Communications Manager IM & Presence Service Unified CM IM&P Software could allow an authenticated, remote attacker to cause the Cisco XCP Authentication Service on an affected device to restart, resulting in a denial of service DoS condition. The vulnerability is...

Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software WebVPN Portal Access Rule Bypass Vulnerability

Update from October 22nd, 2020: Cisco has become aware of a new Cisco Adaptive Security Appliance vulnerability that could affect the fixed releases recommended for code trains 9.13 and 9.14 in the Fixed Software "fs" section of this advisory. See the Cisco Adaptive Security Appliance Software...

Cisco IOS XE Software Ethernet Frame Denial of Service Vulnerability

A vulnerability in Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a device to reload. The vulnerability is due to incorrect handling of certain valid, but not typical, Ethernet frames. An attacker could exploit this vulnerability by sending the Ethernet frames on...

Cisco IOS XE Software Arbitrary Code Execution Vulnerability

A vulnerability in the implementation of the Lua interpreter that is integrated in Cisco IOS XE Software could allow an authenticated, local attacker to execute arbitrary code with root privileges on the underlying Linux operating system OS of an affected device. The vulnerability is due to...

Cisco SD-WAN vManage Software SQL Injection Vulnerability

A vulnerability in the web-based management interface for Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to impact the integrity of an affected system by executing arbitrary SQL queries. The vulnerability is due to insufficient validation of user-supplied input. An...

Cisco TelePresence Collaboration Endpoint and RoomOS Software Command Injection Vulnerability

A vulnerability in the software upgrade process of Cisco TelePresence Collaboration Endpoint Software and Cisco RoomOS Software could allow an authenticated, remote attacker to modify the filesystem to cause a denial of service DoS or gain privileged access to the root filesystem. The vulnerabili...

Cisco IOS XR Software Border Gateway Protocol Attribute Denial of Service Vulnerability

A vulnerability in the implementation of the Border Gateway Protocol BGP functionality in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition. The vulnerability is due to incorrect processing of a BGP update message that contains a...

Cisco AnyConnect Secure Mobility Client for Linux Out-of-Bounds Memory Read Vulnerability

A vulnerability in the HostScan component of Cisco AnyConnect Secure Mobility Client for Linux could allow an unauthenticated, remote attacker to read sensitive information on an affected system. The vulnerability exists because the affected software performs improper bounds checks. An attacker...

Cisco HyperFlex World-Readable Sensitive Information Vulnerability

A vulnerability in the installation process of Cisco HyperFlex Software could allow an authenticated, local attacker to read sensitive information. The vulnerability is due to insufficient cleanup of installation files. An attacker could exploit this vulnerability by accessing the residual...

Cisco Tetration Analytics Cross-Site Scripting Vulnerability

A vulnerability in the web-based management interface of Cisco Tetration Analytics could allow an unauthenticated, remote attacker to conduct a cross-site scripting XSS attack against a user of the web-based management interface of an affected device. The vulnerability is due to insufficient...

Cisco 5500 and 8500 Series Wireless LAN Controller Information Disclosure Vulnerability

A vulnerability in the REST API of Cisco 5500 and 8500 Series Wireless LAN Controller WLC Software could allow an unauthenticated, remote attacker to view system information that under normal circumstances should be prohibited. The vulnerability is due to incomplete input and validation checking...

Cisco Firepower Detection Engine Secure Sockets Layer Denial of Service Vulnerability

A vulnerability in the Secure Sockets Layer SSL packet reassembly functionality of the detection engine in Cisco Firepower System Software could allow an unauthenticated, remote attacker to cause the detection engine to consume excessive system memory on an affected device, which could cause a...

Cisco StarOS Interface Forwarding Denial of Service Vulnerability

A vulnerability in the egress packet processing functionality of the Cisco StarOS operating system for Cisco Aggregation Services Router ASR 5700 Series devices and Virtualized Packet Core VPC System Software could allow an unauthenticated, remote attacker to cause an interface on the device to...

Cisco Firepower Threat Defense SSL Engine High CPU Denial of Service Vulnerability

A vulnerability in the Secure Sockets Layer SSL Engine of Cisco Firepower System Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition. The vulnerability is due to improper error handling while processing SSL traffic. An attacker could exploit this...

Cisco Unified Communications Manager Information Disclosure Vulnerability

A vulnerability in the web framework of Cisco Unified Communications Manager could allow an unauthenticated, remote attacker to view sensitive data. The vulnerability is due to insufficient protection of database tables. An attacker could exploit this vulnerability by browsing to a specific URL. ...

Cisco WebEx Meetings Server Information Disclosure Vulnerability

A vulnerability in Cisco WebEx Meetings Server could allow an authenticated, remote attacker to access sensitive data about the application. An attacker could exploit this vulnerability to obtain information to conduct additional reconnaissance attacks. The vulnerability is due to a design flaw i...

Cisco NX-OS System Software Patch Installation Arbitrary File Write Vulnerability

A vulnerability in Cisco NX-OS System Software patch installation could allow an authenticated, local attacker to write a file to arbitrary locations. The vulnerability is due to insufficient restrictions in the patch installation process. An attacker could exploit this vulnerability by installin...

Cisco IOS XE Software for Cisco ASR 920 Series Routers Arbitrary File Overwrite Vulnerability

A vulnerability in the USB-modem code of Cisco IOS XE Software running on Cisco ASR 920 Series Aggregation Services Routers could allow an authenticated, local attacker to overwrite arbitrary files on the underlying operating system of an affected device. The vulnerability is due to improper inpu...

Cisco Prime LAN Management Solution Session Fixation Vulnerability

A vulnerability in the web functionality of the Cisco Prime LAN Management Solution could allow an authenticated, remote attacker to hijack another user's administrative session. The vulnerability is due to the reuse of a preauthentication session token as part of the postauthentication session. ...

Cisco Adaptive Security Appliance Username Enumeration Information Disclosure Vulnerability

A vulnerability in the web interface of the Cisco Adaptive Security Appliance ASA could allow an unauthenticated, remote attacker to determine valid usernames. The attacker could use this information to conduct additional reconnaissance attacks. The vulnerability is due to the interaction between...

Cisco Prime Collaboration Provisioning Tool UpgradeManager File Write Vulnerability

A vulnerability in the UpgradeManager of the Cisco Prime Collaboration Provisioning Tool could allow an authenticated, remote attacker to write arbitrary files as root on the system. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by...

Cisco StarOS CLI Command Injection Vulnerability

A vulnerability in the CLI command-parsing code of the Cisco StarOS operating system for Cisco ASR 5000 Series, 5500 Series, and 5700 Series devices and Cisco Virtualized Packet Core VPC Software could allow an authenticated, local attacker to break from the StarOS CLI of an affected system and...

Cisco Ultra Services Framework AutoVNF Arbitrary Direction Creation Vulnerability

A vulnerability in the AutoVNF logging function of Cisco Ultra Services Framework could allow an unauthenticated, remote attacker to create arbitrary directories on the affected system. The vulnerability is due to insufficient checks when creating directories on the system. An attacker could...

Cisco Prime Collaboration Provisioning Directory Traversal Arbitrary File Deletion Vulnerability

A vulnerability in the web interface of Cisco Prime Collaboration Provisioning Software could allow an authenticated, remote attacker to delete any file from an affected system. The vulnerability exists because the affected software does not perform proper input validation of HTTP requests and...

Cisco Unified Communications Manager Cross-Site Scripting Vulnerability

A vulnerability in the web-based management interface of Cisco Unified Communications Manager could allow an unauthenticated, remote attacker to conduct a cross-site scripting XSS attack against a user of the web-based management interface of an affected device. The vulnerability is due to...

Cisco Firepower Detection Engine Pragmatic General Multicast Protocol Decoding Denial of Service Vulnerability

A vulnerability in the detection engine parsing of Pragmatic General Multicast PGM protocol packets for Cisco Firepower System Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition due to the Snort process unexpectedly restarting. The vulnerability is...

Cisco Integrated Management Controller Redirection Vulnerability

A vulnerability in the web interface of Cisco Integrated Management Controller IMC Software could allow an unauthenticated, remote attacker to redirect a user to a malicious web page. The vulnerability is due to improper input validation of parameters in HTTP requests. An attacker could exploit...