CVE-2026-76461
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.
Actively exploited
- In the CISA exploited-vulnerabilities catalogue since Sep 14, 2026
- US federal agencies must remediate it by Sep 17, 2026 (BOD 22-01)
- Attacked 1 day before the vulnerability was made public
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Source: CISA KEV · Sep 14, 2026 Sep 14, 2026
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected products
| Vendors | Product | Versions |
|---|---|---|
| cisco | asyncos | < 15.5.5-014 |
| cisco | secure email gateway virtual appliance c100v | - |
| cisco | secure email gateway virtual appliance c300v | - |
| cisco | secure email gateway virtual appliance c600v | - |
| cisco | secure email gateway c195 | - |
| cisco | secure email gateway c395 | - |
| cisco | secure email gateway c695 | - |
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