What is CVE-2026-53994?

CVE-2026-53994 is a high-severity vulnerability in Proftpd Project, classified under Heap-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-07-18.

How severe is CVE-2026-53994?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Proftpd Project

CVE-2026-53994

ProFTPD mod_sftp contains a heap-based buffer overflow reachable by an authenticated SFTP user. The fxp_packet_read() function accepts the attacker-supplied 32-bit big-endian SFTP packet length without a minimum sanity check. A value of 0…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Proftpd Project — versions 0

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

disclosure@vulncheck.com (product)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-53994?: CVE-2026-53994 is a high-severity vulnerability in Proftpd Project, classified under Heap-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-07-18.
How severe is CVE-2026-53994?: High severity. CVSS v3 base score is 7.5 out of 10.