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CVE-2026-76443 is a critical grouping of internally discovered improper-neutralization vulnerabilities affecting Cisco Secure Email Gateway and Cisco Secure Email and Web Manager. The issues are classified under CWE-707 and involve failure to safely treat crafted input as data, potentially encompassing injection classes such as command, SQL, code/eval, or cross-site-scripting injection. Cisco has not published the affected endpoints, individual root causes, or reproduction paths. The assigned CVSS v3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H (9.8).
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
One of five additional Cisco Secure Email Gateway and Secure Email and Web Manager vulnerabilities addressed by Cisco; rated critical (CVSS 9.8).
A critical Cisco vulnerability affecting Secure Email Gateway and Secure Email and Web Manager appliances regardless of configuration. The content provides no technical vulnerability details.
A critical improper-neutralization vulnerability, including SQL or code-injection issues, addressed in the same Cisco Secure Email hardening release.
The most severe vulnerability grouping in Cisco's hardening release: an unauthenticated, remotely reachable improper-neutralization flaw that can cause crafted input to be executed on affected Cisco email security appliances.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.