CVE-2026-20269

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-2026-20301 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-2026-20273 Cisco IOS XE Software Security Hardening Release

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-2026-20270: 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-2026-20124: 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-2026-20269: 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-2026-20272: 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-2026-20273: 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-2026-20301: 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-2026-20308: 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...

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-2026-20267: 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-2026-20263: 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...

Cisco IOS Software IKEv2 Multiple Vulnerabilities (cisco-sa-asa-ftd-ios-dos-DOESHWHy)

According to its self-reported version, Cisco IOS is affected by multiple vulnerabilities. - A vulnerability in the IKEv2 feature of Cisco IOS Software, IOS XE Software, Secure Firewall ASA Software, and Secure FTD Software could allow an unauthenticated, remote attacker to cause the device to...

Cisco Advance Notification for Publication of August 5, 2026, Security Advisories

On August 5, 2026, the Cisco Product Security Incident Response Team PSIRT published the following advisories: Cisco Security Advisory CVE ID Security Impact Rating CVSS Base Score Cisco Catalyst SD-WAN Software Security Hardening Release: August 2026...

Cisco Adaptive Security Appliance Software, Firepower Threat Defense Software, IOS Software, and IOS XE Software IKEv2 DoS (cisco-sa-multiprod-ikev2-dos-gPctUqv2)

According to its self-reported version, Cisco IOS XE Software is affected by a vulnerability. - A vulnerability in the Internet Key Exchange version 2 IKEv2 protocol processing of Cisco Adaptive Security Appliance ASA Software, Cisco Firepower Threat Defense FTD Software, Cisco IOS Software, and...

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-2026-20004: Missing Reference to Active Allocated Resource

A vulnerability in the TLS library of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to exhaust the available memory of an affected device. This vulnerability is due to improper management of memory resources during TLS connection setup. An attacker could exploit this...