CVE•Published 2026-07-29•Modified 2026-07-29•1 article on news•5 live references•NVD data
CVE-2026-67191
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
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Weaknesses (CWE)
Description
Xlight FTP Server before 3.9.5 contains a pre-authentication heap buffer overflow vulnerability that allows remote unauthenticated attackers to write past the end of a heap buffer by sending a malformed SSH client identification string. A logic error in the recv loop's termination condition uses an incorrect OR operator where an AND operator is required, enabling exploitation on any SSH or SFTP connection before authentication occurs.
Timeline
Published 2026-07-29
Modified 2026-07-29
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
More intel sources (5)
Shodan report
vuln:CVE-2026-67191Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-67191Censys host search filtered to this CVE id.
grep.app
CVE-2026-67191Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-67191GitHub code search for direct mentions.
Google dork
"CVE-2026-67191" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-67191 on GitHub.