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CVE-2026-67192 is a pre-authentication stack buffer overflow in Xlight FTP Server affecting versions before 3.9.5. The flaw occurs in the server's SSH packet handling when a GCM cipher is negotiated. A malformed SSH packet can supply an unvalidated length field that is passed directly to the GCM decrypt function, resulting in stack memory corruption. The overflow can overwrite sensitive control data on the stack, including the stack cookie and return address, creating a path to remote code execution prior to successful authentication.
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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.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.