CVE-2026-76461

Description

A vulnerability in the email parsing of Cisco AsyncOS Software for Cisco Secure Email Gateway could allow an unauthenticated, remote attacker to execute arbitrary commands with root privileges on the underlying operating system. This vulnerability is due to insufficient validation in the email parsing logic. An attacker could exploit this vulnerability by sending a crafted email message that contains malicious SQL statements through an affected device. A successful exploit could allow the attacker to execute arbitrary SQL statements, leading to command execution with root privileges on the underlying operating system.

Scoring

• CVSS: 9.8 (CRITICAL, 3.1)
• EPSS exploitation probability: Not yet available
• EPSS percentile: Not yet available

CISA KEV status

• Added to KEV: 2026-09-14
• Remediation due date: 2026-09-17
• Known ransomware campaign use: Unknown

Weakness types (CWE)

• CWE-89

References

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-inj-2bLVGmhX
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-76461

More from Cisco

• CVE-2026-76418 — Secure Firewall ASA Software and Cisco Secure FTD Software
• CVE-2026-76519 — Secure Email Gateway
• CVE-2026-76504 — Catalyst SD-WAN Manager
• CVE-2026-76460 — Identity Services Engine
• CVE-2026-20079 — Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management