Cisco AsyncOS up to 16.0.4-016 Email Parsing sql injection

Summaryinfo

A vulnerability labeled as critical has been found in Cisco AsyncOS. Affected by this issue is some unknown functionality of the component Email Parsing. The manipulation results in sql injection. This vulnerability is reported as CVE-2026-76461. The attack can be launched remotely. Moreover, an exploit is present. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Cisco AsyncOS. It has been classified as critical. Affected is an unknown part of the component Email Parsing. The manipulation with an unknown input leads to a sql injection vulnerability. CWE is classifying the issue as CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at sec.cloudapps.cisco.com. This vulnerability is traded as CVE-2026-76461 since 08/19/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are unknown but an exploit is available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/15/2026). This vulnerability is assigned to T1505 by the MITRE ATT&CK project.

It is declared as attacked. This issue was added on 09/14/2026 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 09/17/2026:

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 BO

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

• Cisco

Name

• AsyncOS

Version

• 13.0.0-392
• 13.0.5-007
• 13.5.1-277
• 13.5.4-038
• 14.0.0-698
• 14.2.0-620
• 14.2.1-020
• 14.3.0-032
• 15.0.0-104
• 15.0.1-030
• 15.0.3-002
• 15.0.5-016
• 15.5.0-048
• 15.5.1-055
• 15.5.2-018
• 15.5.3-022
• 15.5.4-012
• 16.0.0-050
• 16.0.0-054
• 16.0.1-017
• 16.0.2-112
• 16.0.3-044
• 16.0.4-016

License

• commercial

Website

• Vendor: https://www.cisco.com/

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