CVE Explorer
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.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1
Preserved source conflicts
No provider value was silently selected as the winner.
cwe · 2 assertions
{"description":"n/a","lang":"en","type":"text"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:5f212ba9f844e9046edd7e306f0e13f8c8734fbe77831f51c25ca0a68f29730c · sha256:afabdfd9112697ed… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-122","description":"CWE-122 Heap-based Buffer Overflow","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:5f212ba9f844e9046edd7e306f0e13f8c8734fbe77831f51c25ca0a68f29730c · sha256:afabdfd9112697ed… · /containers/adp/0/problemTypes/0/descriptions/0
Affected products and versions
1 source assertion{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:5f212ba9f844e9046edd7e306f0e13f8c8734fbe77831f51c25ca0a68f29730c · sha256:afabdfd9112697ed… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:5f212ba9f844e9046edd7e306f0e13f8c8734fbe77831f51c25ca0a68f29730c · sha256:afabdfd9112697ed… · /containers/adp/0/metrics/0/cvssV3_1
CWE assertions
2 source assertions{"description":"n/a","lang":"en","type":"text"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:5f212ba9f844e9046edd7e306f0e13f8c8734fbe77831f51c25ca0a68f29730c · sha256:afabdfd9112697ed… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-122","description":"CWE-122 Heap-based Buffer Overflow","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:5f212ba9f844e9046edd7e306f0e13f8c8734fbe77831f51c25ca0a68f29730c · sha256:afabdfd9112697ed… · /containers/adp/0/problemTypes/0/descriptions/0
Source references
3 source assertions{"url":"https://github.com/davenardella/snap7"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:5f212ba9f844e9046edd7e306f0e13f8c8734fbe77831f51c25ca0a68f29730c · sha256:afabdfd9112697ed… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/davenardella/snap7/issues/14"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:5f212ba9f844e9046edd7e306f0e13f8c8734fbe77831f51c25ca0a68f29730c · sha256:afabdfd9112697ed… · /containers/adp/0/references/0
{"url":"https://github.com/davenardella/snap7/issues/14"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:5f212ba9f844e9046edd7e306f0e13f8c8734fbe77831f51c25ca0a68f29730c · sha256:afabdfd9112697ed… · /containers/cna/references/1
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.