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.
How to fix
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.
CISA due date: Sep 17, 2026- cisco asyncos15.5.5-014, 16.0.4-302, 16.5.0-780 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco asyncos | v < 15.5.5-014, 16.0 ≤ v < 16.0.4-302, 16.5 ≤ v < 16.5.0-780 | 15.5.5-014, 16.0.4-302, 16.5.0-780 |
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