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CVE-2026-76442 is an improper validation of specified quantity in input vulnerability in Cisco Secure Email Gateway and Cisco Secure Email and Web Manager. The flaw affects unbounded numeric input fields, permitting an unauthenticated remote attacker to submit input that drives excessive resource consumption on an affected appliance. Cisco groups this issue among internally discovered software-hardening defects and assigns it CWE-1284.
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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.
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High-severity (CVSS 7.5) vulnerability in Cisco Secure Email Gateway and Secure Email and Web Manager addressed by Cisco security updates.
An improper input-quantity validation vulnerability addressed in the same Cisco Secure Email hardening release.
One of five Cisco Secure Email Gateway and Secure Email and Web Manager vulnerability groupings disclosed in a September 2026 hardening release. Cisco did not publish per-issue technical details, affected endpoints, root cause, or reproduction paths.
An internally discovered improper validation of specified quantity input vulnerability affecting Cisco Secure Email Gateway and Cisco Secure Email and Web Manager; addressed through Cisco software-hardening releases.
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.