CVE-2026-20355 Cisco Secure Email S/MIME Ciphertext Decryption Vulnerabilty

Multiple vulnerabilities in the Secure/Multipurpose Internet Mail Extensions S/MIME decryption functionality of Cisco Secure Email could allow an unauthenticated, remote attacker to recover plain text from encrypted email messages. These vulnerabilities are due to insufficient validation of messa...

EUVD-2026-70211

Multiple vulnerabilities in the Secure/Multipurpose Internet Mail Extensions S/MIME decryption functionality of Cisco Secure Email could allow an unauthenticated, remote attacker to recover plain text from encrypted email messages. These vulnerabilities are due to insufficient validation of messa...

CVE-2026-20355

CVE-2026-20355 affects the S/MIME decryption functionality of Cisco Secure Email . The root cause is insufficient validation of message integrity , allowing an unauthenticated, remote attacker to use a machine-in-the-middle technique to intercept and modify traffic between email gateways and reco...

EUVD-2026-70210

Multiple vulnerabilities in the Secure/Multipurpose Internet Mail Extensions S/MIME decryption functionality of Cisco Secure Email could allow an unauthenticated, remote attacker to recover plain text from encrypted email messages. These vulnerabilities are due to insufficient validation of messa...

CVE-2026-20354

CVE-2026-20354 affects the S/MIME decryption functionality of Cisco Secure Email . The root cause is insufficient validation of message integrity , allowing an unauthenticated remote attacker to use a man-in-the-middle technique to intercept and modify traffic between email gateways. A successful...

CVE-2026-20354 Cisco Secure Email S/MIME Ciphertext Decryption Vulnerabilty

Multiple vulnerabilities in the Secure/Multipurpose Internet Mail Extensions S/MIME decryption functionality of Cisco Secure Email could allow an unauthenticated, remote attacker to recover plain text from encrypted email messages. These vulnerabilities are due to insufficient validation of messa...

EUVD-2026-70209

A vulnerability in Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 that are running Cisco Session Initiation Protocol SIP Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. This...

CVE-2026-20281

Cisco Desk Phone 9800 Series, IP Phone 7800/8800 Series, and Video Phone 8875 running Cisco SIP Software are affected by a denial-of-service vulnerability caused by improper memory management when processing HTTP packets. An unauthenticated, remote attacker can send a continuous stream of crafted...

CVE-2026-20281 Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Software Denial of Service Vulnerability

A vulnerability in Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 that are running Cisco Session Initiation Protocol SIP Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. This...

CVE-2026-20278 Cisco IOS XR Software Security Hardening Release: September 2026

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

CVE-2026-20278

CVE-2026-20278 affects Cisco IOS XR Software and stems from improper neutralization issues (CWE-707) discovered through Cisco's internal security review. Multiple vulnerabilities are grouped under this single CVE in the September 2026 hardening release . The CVSS 3.1 score is 8.8 (HIGH) with a ne...

EUVD-2026-70208

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

CVE-2026-20278 Cisco IOS XR Software Security Hardening Release: September 2026

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

CVE-2026-20280 Cisco IOS XR Software Security Hardening Release: September 2026

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

EUVD-2026-70207

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

CVE-2026-20280

CVE-2026-20280 is a Cisco IOS XR Software security hardening release (September 2026) addressing multiple internally discovered vulnerabilities classified under CWE-703 (improper checking or handling of exceptional conditions). The weaknesses are reachable over the network with low privileges and...

CVE-2026-20280 Cisco IOS XR Software Security Hardening Release: September 2026

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

CVE-2026-20279

Cisco IOS XR Software is affected by improper access control weaknesses (CWE-284) identified through an internal security review and addressed in the September 2026 security hardening release . The CVSS v3.1 score is 9.8 (Critical) , with a vector indicating network attack vector , low complexity...

EUVD-2026-70206

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

CVE-2026-20279 Cisco IOS XR Software Security Hardening Release: September 2026

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