What is CVE-2026-51218?

CVE-2026-51218 is a high-severity vulnerability in N/a, classified under Heap-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-06-29.

How severe is CVE-2026-51218?

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

Buffer overflow in N/a

CVE-2026-51218

A heap buffer overflow in the TS7Worker::PerformFunctionWrite() function (/core/s7_server.cpp) of snap7 v1.4.3 allows attackers to cause a Denial of Service (DoS) via a crafted packet.

Vulnerability class: Buffer Overflow

EPSS: 0.003 (22.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

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

Affected products

N/a — versions n/a

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-51218?: CVE-2026-51218 is a high-severity vulnerability in N/a, classified under Heap-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-06-29.
How severe is CVE-2026-51218?: High severity. CVSS v3 base score is 7.5 out of 10.