CVE-2026-20301 Cisco IOS Software and IOS XE Software Extensible Messaging Client Protocol Denial of Service Vulnerability

A vulnerability in the Extensible Messaging Client Protocol XMCP, also referred to as the External Client protocol, of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. This vulnerability ...

CVE-2026-20308: Improper Privilege Management

A vulnerability in the web-based management interface of Cisco IOS XE Software could allow an authenticated, remote attacker with low privileges to perform a denial of service DoS attack against an affected device. This vulnerability is due to insufficient input validation. An attacker could...

PT-2026-68247

Name of the Vulnerable Software and Affected Versions Cisco IOS XE Software affected versions not specified Description Insufficient input validation in the web-based management interface allows an authenticated remote attacker with low privileges to execute a denial of service DoS attack. By...

CVE-2026-20311: Buffer Over-read

A vulnerability in the web-based management interface of Cisco IOS XE Software could allow an authenticated, remote attacker with low privileges to cause a denial of service DoS condition on an affected device. This vulnerability is due to insufficient error handling in the web-based management...

CVE-2026-20273: Improper Input Validation

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. T...

CVE-2026-20272: Improper Neutralization of Special Elements in Output Used by a Downstream Component

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The...

CVE-2026-20271: Insufficient Control Flow Management

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The...

CVE-2026-20270: Incorrect Calculation

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The...

CVE-2026-20269: Improper Control of a Resource Through its Lifetime

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The...

CVE-2026-20268: Improper Restriction of Operations within the Bounds of a Memory Buffer

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The...

CVE-2026-20267: Improper Access Control

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The...

CVE-2026-20124: Missing Release of Resource after Effective Lifetime

A vulnerability in the Simple Network Management Protocol SNMP subsystem of Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload, resulting in a denial of service DoS condition. This vulnerability is due to improper error handling when parsing...

CVE-2026-20301: Unchecked Input for Loop Condition

A vulnerability in the Extensible Messaging Client Protocol XMCP, also referred to as the External Client protocol, of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. This vulnerability ...

CVE-2026-20263: Undefined Security Weakness

A vulnerability in the Blocks Extensible Exchange Protocol BEEP feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. This vulnerability is due to improper handling when parsing a specific BEEP SOAP...

CVE-2026-20004

Cisco IOS XE TLS library vulnerability (CVE-2026-2004) could allow an unauthenticated, adjacent attacker to exhaust memory on an affected device, causing a reload and DoS. Root cause: improper memory management during TLS setup. Exploitation involves repeated TLS-triggering actions such as EAP at...

CVE-2026-20115: Cleartext Transmission of Sensitive Information

A vulnerability in Cisco IOS XE Software for Cisco Meraki could allow a remote, unauthenticated attacker to view confidential device information. This vulnerability is due to a device configuration upload being performed over an insecure tunnel. An attacker could exploit this vulnerability by...

CVE-2026-20125: Improper Handling of Syntactically Invalid Structure

A vulnerability in the HTTP Server feature of Cisco IOS Software and Cisco IOS XE Software Release 3E could allow an authenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service DoS condition. This vulnerability is due to improper validation ...

CVE-2026-20114: Improper Validation of Syntactic Correctness of Input

A vulnerability in the Lobby Ambassador web-based management API of Cisco IOS XE Software could allow an authenticated, remote attacker to elevate their privileges and access management APIs that would not normally be available for Lobby Ambassador users. This vulnerability exists because...

CVE-2026-20113: Improper Neutralization of CRLF Sequences

A vulnerability in the web-based Cisco IOx application hosting environment management interface of Cisco IOS XE Software could allow an unauthenticated, remote attacker to perform a carriage return line feed CRLF injection attack against a user. This vulnerability is due to insufficient validatio...

CVE-2026-20112: Improper Neutralization of Input During Web Page Generation

A vulnerability in the web-based Cisco IOx application hosting environment management interface of Cisco IOS XE Software could allow an authenticated, remote attacker to conduct a stored cross-site scripting XSS attack against a user of the web-based management interface of an affected device. Th...