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CVE-2026-76461: Critical Cisco Secure Email Gateway Vulnerability Exploited in the Wild

medrapid7Published 2026-09-15

<h2 style="direction: ltr;">Overview</h2><p style="direction: ltr;"><span style="font-size: undefined;">On September 14, 2026, Cisco published a security </span><a href="https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-inj-2bLVGmhX"><span style="font-size: undefined;">advisory</span></a><span style="font-size: undefined;"> for </span><a href="https://www.r

MITRE ATT&CK techniques

VulnerabilitiesT1588.006

Indicators of compromise

CVE-2026-76461cve
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-inj-2bLVGmhXurl
https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hurl

Original source: https://www.rapid7.com/blog/post/etr-cve-2026-76461-critical-cisco-secure-email-gateway-vulnerability-exploited-in-the-wild