CVE-2026-76519: cisco asyncos

CVSS 9.8 (critical) · listed as exploited by CISA since 2026-10-14 · published 2026-10-14

A vulnerability in the Advanced Malware Protection (AMP) feature of Cisco Secure Email Gateway could allow an unauthenticated, remote attacker to write arbitrary files on the underlying operating system. This vulnerability is due to improper handling of email attachments when the file reputation service is enabled. An attacker could exploit this vulnerability by sending an email that contains a crafted attachment through an affected device. A successful exploit could allow the attacker to write arbitrary files and execute commands with root privileges on the underlying operating system.

Affected products (NVD): cisco asyncos

Fixed in (NVD): 15.5.5-014, 16.5.0-780

Weakness: CWE-23

Source: NVD CVE-2026-76519

References

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-afw-zqYJkjxp
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-76519

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