Buffer overflow in Eipstackgroup Opener
CVE-2026-10703
A security vulnerability has been detected in EIPStackGroup OpENer up to 2.3.0. Affected is the function CreateMessageRouterRequestStructure of the file cipmessagerouter.c of the component SendRRData Handler. The manipulation leads to use after free. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.002 (14.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Eipstackgroup Opener — versions 2.0, 2.1, 2.2
Weakness classification (CWE)
References
- vuldb.com/vuln/368016 (technical-description, vdb-entry)
- vuldb.com/vuln/368016/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-10703 (third-party-advisory)
- vuldb.com/submit/830921 (third-party-advisory)
- github.com/EIPStackGroup/OpENer/issues/566 (issue-tracking)
- github.com/user-attachments/files/27100961/poc.zip (exploit)
- github.com/EIPStackGroup/OpENer/ (product)
Frequently asked questions
- What is CVE-2026-10703?
- CVE-2026-10703 is a medium-severity vulnerability in Eipstackgroup Opener, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.3/10. Published 2026-06-03.
- How severe is CVE-2026-10703?
- Medium severity. CVSS v3 base score is 6.3 out of 10.