Critical [CVE-2026-76461] Cisco Secure Email Gateway SQL Injection Vulnerability
This critical-severity Cisco advisory covers CVE-2026-76461 affecting Cisco Secure Email.
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Summary
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.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- 15.5.5-0141
- 16.0.4-3021
- 16.5.0-780
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- On-Premises Physical Devices If exploitation is suspected on a physical appliance, Cisco recommends contacting the Cisco Technical Assistance Center (TAC) for further support.
- To expedite our investigation into the potential compromise, please ensure that remote access is enabled on the affected appliances.
- For more guidance, see FAQ for Remote Access on Cisco ESA/WSA/SMA.
- On-Premises Virtual Devices If exploitation is suspected on a virtual appliance, Cisco strongly recommends the following actions to restore a device to a secure configuration, when possible: Maintain forensics information, as described in the incident handling policies of the customer.
- Important: Record forensics information before continuing to any of the following steps.
- Deploying a new instance will destroy the configurations and logs.
- Deploy a new virtual machine running one of the fixed software releases.
- Rebuild the product configuration.
- There are no workarounds that address this vulnerability.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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