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CVE-2026-51537

EIPStackGroup OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in Connection Manager handling of ForwardOpen requests when processing short malformed packets. An attacker can send a valid ENIP outer frame carrying a malformed CIP ForwardOpen/LargeForwardOpen request, causing the parser to continue reading fields even when request data is insufficient. This issue is remotely triggerable via network traffic and does not require authentication.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b7524338959888ac87905bb6c60ca1de243aca635ea62936087775676712aec0
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:v2:1fa4f4e7ba5c5ac992e40440d8e8627326143cf42f7f6e15a4d2e0048181547c · sha256:adf400adc1f63068… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1fa4f4e7ba5c5ac992e40440d8e8627326143cf42f7f6e15a4d2e0048181547c · sha256:adf400adc1f63068… · /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:v2:1fa4f4e7ba5c5ac992e40440d8e8627326143cf42f7f6e15a4d2e0048181547c · sha256:adf400adc1f63068… · /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:v2:1fa4f4e7ba5c5ac992e40440d8e8627326143cf42f7f6e15a4d2e0048181547c · sha256:adf400adc1f63068… · /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:v2:1fa4f4e7ba5c5ac992e40440d8e8627326143cf42f7f6e15a4d2e0048181547c · sha256:adf400adc1f63068… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1fa4f4e7ba5c5ac992e40440d8e8627326143cf42f7f6e15a4d2e0048181547c · sha256:adf400adc1f63068… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

3 source assertions
{"url":"https://gist.github.com/MrAlaskan/a5fb0fb7765c9df80d28220ed558f04e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1fa4f4e7ba5c5ac992e40440d8e8627326143cf42f7f6e15a4d2e0048181547c · sha256:adf400adc1f63068… · /containers/cna/references/1
{"url":"https://github.com/EIPStackGroup/OpENer/issues/564"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1fa4f4e7ba5c5ac992e40440d8e8627326143cf42f7f6e15a4d2e0048181547c · sha256:adf400adc1f63068… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/EIPStackGroup/OpENer/issues/564"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1fa4f4e7ba5c5ac992e40440d8e8627326143cf42f7f6e15a4d2e0048181547c · sha256:adf400adc1f63068… · /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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