U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Cisco Secure Email Gateway flaw to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added a Cisco Secure Email Gateway flaw, tracked as CVE-2026-76461 (CVSS score of 9,8), to its Known Exploited Vulnerabilities (KEV) catalog. Cisco disclosed a critical zero-day CVE-2026-76461 this week; […]

Cisco warns of a critical zero-day in Secure Email Gateway, exploited in the wild to gain root access through malicious emails. Cisco disclosed a critical zero-day, tracked as CVE-2026-76461 (CVSS score of 9.8), affecting Secure Email Gateway appliances. The flaw can be exploited remotely without authentication. Attackers can send specially crafted emails containing malicious SQL […]

Attackers have leveraged a zero-day SQL injection vulnerability (CVE-2026-76461) to compromise Cisco Secure Email Gateway appliances, Cisco confirmed on Monday. The vendor’s Product Security Incident Response Team became aware of active exploitation of this vulnerability in September 2025, and has shared indicators of compromise that organizations can look for to check whether they’ve been hit. About CVE-2026-76461 The vulnerability affects versions 16.5, 16.0, and 15.5 and earlier of Cisco AsyncOS Software, running on on-premises physical … More → The post Cisco patches actively exploited email gateway zero-day (CVE-2026-76461) appeared first on Help Net Security .

Cisco has warned that a new critical vulnerability impacting AsyncOS Software for Cisco Secure Email Gateway has come under active exploitation in the wild. The vulnerability, tracked as CVE-2026-76461, carries a CVSS score of 9.8 out of a maximum of 10.0. It has been described as a case of insufficient validation in the email parsing logic that could allow an unauthenticated, remote attacker

Cisco AsyncOS software for Cisco Secure Email Gateway (SEG) contains a SQL injection vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary commands with root privileges on the underlying operating system.