CVE-2026-51540: OpENer 2.3.0 (master branch up to commit 76b95cf) is vulnerable to a severe memory corruption issue caused by an integer

Description

A vulnerability, which was classified as very critical, was found in EIPStackGroup OpENer up to 2.3.0. This issue affects some unknown processing of the component SendUnitData. Executing a manipulation can lead to integer underflow.

Affected Products

Vendor	Product	Versions
opener	opener	n/a, 2.3.0

References

Related News (1 articles)

Tier C

VulDB5h ago

CVE-2026-51540 | EIPStackGroup OpENer up to 2.3.0 SendUnitData integer underflow

→ No new info (linked only)

CISA KEV❌ No

Actively exploited✅ Yes

PublishedJul 13, 2026

Last enriched4h agov2

Trending Score46

Source articles1

Independent1

Info Completeness6/14

Missing: cvss, epss, cwe, kev, exploit, patch, iocs, mitre_attack

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Related CVEs (1)

HIGHCVE-2026-51541

Version History

Last enriched 4h ago

v2Tier C4h ago

Updated vendor to EIPStackGroup, product to OpENer, severity to HIGH, and marked the vulnerability as actively exploited.

descriptionaffectedVersionsseverityactivelyExploited

via VulDB

v15h ago

Initial creation