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CVE-2026-51536

In OpENer 2.3.0 (commit 76b95cf) when parsing incoming CIP (Common Industrial Protocol) network packets, the length parameter is inconsistently typed across the call stack. Specifically, an upstream length calculated as an int is passed to a downstream function that expects an EipInt16 (a 16-bit signed integer). If a maliciously crafted packet with specific length fields is processed, the length parameter can overflow or be truncated into a negative value. This negative length bypasses subsequen
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:98d29937452b519b6ccf54d0864c7b1c6a53395c5b03067125055371964b4c1a
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_v5cwe
    urn:baitaphish:normalized-source-record:v2:7d7e0f25dc61560c68fbfab466dd5dfd5f0143ae513c544bcbfa585d9b59e75a · sha256:fc0a70b2ea8261da… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-190","description":"CWE-190 Integer Overflow or Wraparound","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7d7e0f25dc61560c68fbfab466dd5dfd5f0143ae513c544bcbfa585d9b59e75a · sha256:fc0a70b2ea8261da… · /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_v5affected
    urn:baitaphish:normalized-source-record:v2:7d7e0f25dc61560c68fbfab466dd5dfd5f0143ae513c544bcbfa585d9b59e75a · sha256:fc0a70b2ea8261da… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7d7e0f25dc61560c68fbfab466dd5dfd5f0143ae513c544bcbfa585d9b59e75a · sha256:fc0a70b2ea8261da… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"description":"n/a","lang":"en","type":"text"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7d7e0f25dc61560c68fbfab466dd5dfd5f0143ae513c544bcbfa585d9b59e75a · sha256:fc0a70b2ea8261da… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-190","description":"CWE-190 Integer Overflow or Wraparound","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7d7e0f25dc61560c68fbfab466dd5dfd5f0143ae513c544bcbfa585d9b59e75a · sha256:fc0a70b2ea8261da… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

3 source assertions
{"url":"https://gist.github.com/MrAlaskan/e160c626a32e03e5d9eddaa732560672"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7d7e0f25dc61560c68fbfab466dd5dfd5f0143ae513c544bcbfa585d9b59e75a · sha256:fc0a70b2ea8261da… · /containers/cna/references/1
{"url":"https://github.com/EIPStackGroup/OpENer/issues/563"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7d7e0f25dc61560c68fbfab466dd5dfd5f0143ae513c544bcbfa585d9b59e75a · sha256:fc0a70b2ea8261da… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/EIPStackGroup/OpENer/issues/563"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7d7e0f25dc61560c68fbfab466dd5dfd5f0143ae513c544bcbfa585d9b59e75a · sha256:fc0a70b2ea8261da… · /containers/adp/0/references/0

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.

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