Xlight FTP Server before 3.9.5 contains a pre-authentication stack buffer overflow vulnerability that allows unauthenticated attackers to corrupt stack memory by sending malformed SSH packets when a GCM cipher is negotiated. Attackers can craft packets with an unvalidated length field passed directly to the GCM decrypt function, overwriting the stack cookie and return address to potentially achieve remote code execution before any authentication occurs.
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Affected Vendors & Products
References
History
Thu, 30 Jul 2026 15:30:00 +0000
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Xlightftpd
Xlightftpd xlight Ftp Server |
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Xlightftpd
Xlightftpd xlight Ftp Server |
Wed, 29 Jul 2026 20:30:00 +0000
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ssvc
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Wed, 29 Jul 2026 16:15:00 +0000
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| Description | Xlight FTP Server before 3.9.5 contains a pre-authentication stack buffer overflow vulnerability that allows unauthenticated attackers to corrupt stack memory by sending malformed SSH packets when a GCM cipher is negotiated. Attackers can craft packets with an unvalidated length field passed directly to the GCM decrypt function, overwriting the stack cookie and return address to potentially achieve remote code execution before any authentication occurs. | |
| Title | Xlight FTP Server < 3.9.5 Pre-Auth Stack Buffer Overflow via SSH GCM Cipher | |
| Weaknesses | CWE-121 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-07-29T19:25:06.692Z
Reserved: 2026-07-28T16:06:49.773Z
Link: CVE-2026-67192
Updated: 2026-07-29T19:15:45.513Z
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OpenCVE Enrichment
Updated: 2026-07-30T15:15:03Z