Cisco Secure Email and Web Manager/Secure Email Gateway up to 16.0.4-010 access control

Summaryinfo

A vulnerability classified as very critical has been found in Cisco Secure Email and Web Manager and Secure Email Gateway. This issue affects some unknown processing. Performing a manipulation results in access control. This vulnerability is known as CVE-2026-76441. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical has been found in Cisco Secure Email and Web Manager and Secure Email Gateway. This affects some unknown processing. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Email Gateway and Cisco Secure Email and Web Manager engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-76441 are related to issues with improper access control that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-284.

The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is uniquely identified as CVE-2026-76441 since 08/19/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/14/2026). MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

• Cisco

Name

• Secure Email and Web Manager
• Secure Email Gateway

Version

• 12.8.1-002
• 12.8.1-021
• 13.0.0-249
• 13.0.0-277
• 13.6.1-201
• 13.6.2-023
• 13.6.2-078
• 13.8.1-052
• 13.8.1-068
• 13.8.1-074
• 13.8.1-108
• 14.0.0-404
• 14.1.0-227
• 14.2.0-203
• 14.2.0-212
• 14.2.0-224
• 14.3.0-120
• 15.0.0-334
• 15.0.1-035
• 15.0.2-007
• 15.5.1-024
• 15.5.1-029
• 15.5.2-005
• 15.5.3-017
• 15.5.4-007
• 16.0.0-195
• 16.0.1-010
• 16.0.2-088
• 16.0.3-016
• 16.0.4-010

License

• commercial

Website

• Vendor: https://www.cisco.com/

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