TI-2026-37503 Aliases CVE-2026-51541 GHSA-6q7w-q386-7c4j

OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in CIP message parsing when…

HIGH 80CWE-125Published 2026-07-13 · Updated 2026-07-14

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

OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in CIP message parsing when handling malformed explicit requests with a forged EPath size. An attacker can send a valid ENIP SendRRData frame carrying a very short CIP payload whose path_size field claims that many more path words are present than are actually available. Because the parser trusts the attacker-controlled path_size and continues decoding path segments without a remaining-length boundary, it reads beyond the end of the stack receive buffer.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00551 46th 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

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:opener_project:opener:2.3.0:::::::*	2.3.0	Vulnerable	EIPStackGroup

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.

Timeline

2026-10-02 Threatist record created from CVE-2026-51541
2026-10-03 Alias added: GHSA-6q7w-q386-7c4j

References

Exploit 1

https://github.com/EIPStackGroup/OpENer/issues/582

Advisory 1

https://gist.github.com/MrAlaskan/705c680856e48c535148265c0899ad4b

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-2026-37500 EIPStackGroup OpENer 2.3.0 (commit 76b95cf) suffers from an Incorrect Access Control… CVSS 3.1CRITICAL 9.1
TI-2026-37499 EIPStackGroup OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in Connection… 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