Read the docs
TI-2026-37499 Aliases CVE-2026-51537GHSA-7wpf-vhm2-3mpw

EIPStackGroup OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in Connection…

Priority HIGH 80CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00649 51st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:opener_project:opener:2.3.0:*:*:*:*:*:*:*2.3.0VulnerableEIPStackGroup
  • cpe:2.3:a:opener_project:opener:2.3.0:*:*:*:*:*:*:* Versions 2.3.0 Vulnerable ·EIPStackGroup

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-51537
  2. 2026-10-03 Alias added: GHSA-7wpf-vhm2-3mpw
  3. 2026-10-16 EPSS moved to the 50th–90th percentile

References

Exploit 1

Advisory 1

  • TI-2026-37502 OpENer 2.3.0 (master branch up to commit 76b95cf) is vulnerable to a severe memory… CVSS 3.1CRITICAL 9.8
  • TI-2022-21373 Out-of-bounds write in EIPStackGroup OpENer CVSS 3.1CRITICAL 10.0
  • TI-2022-21372 Out-of-bounds write in EIPStackGroup OpENer CVSS 3.1CRITICAL 10.0
  • TI-2026-37503 OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in CIP message parsing when… CVSS 3.1CRITICAL 9.1
  • TI-2026-37500 EIPStackGroup OpENer 2.3.0 (commit 76b95cf) suffers from an Incorrect Access Control… CVSS 3.1CRITICAL 9.1
  • TI-2026-37498 In OpENer 2.3.0 (commit 76b95cf) when parsing incoming CIP (Common Industrial Protocol)… CVSS 3.1CRITICAL 9.1
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences