What’s Vulnerable › Vulnerabilities

CVE-2026-51218

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-29 · updated 2026-07-30
• Weakness: CWE-122

Description

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.

References

• https://github.com/davenardella/snap7
• https://github.com/davenardella/snap7/issues/14
• https://github.com/davenardella/snap7/issues/14

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