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CVE-2026-76440 is a critical path-traversal vulnerability grouping in Cisco Secure Email Gateway and Cisco Secure Email and Web Manager. The flaws involve improper limitation of pathnames to a restricted directory and/or improper link resolution before file access, allowing crafted path input to access files outside the intended directory boundary. It was addressed in Cisco software-hardening releases.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
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 path-traversal 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.
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.