CVE-2026-10703 EIPStackGroup OpENer SendRRData cipmessagerouter.c CreateMessageRouterRequestStructure use after free
Remote attackers can exploit a use-after-free flaw in OpENer's SendRRData handler to potentially execute code or cause denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-10703?
CVE-2026-10703 is a medium-severity use after free vulnerability in EIPStackGroup OpENer, published on 3 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-10703?
How do I fix CVE-2026-10703?
No fix has been published for CVE-2026-10703 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-10703 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-10703 exists.
Sources
Also known as AZL-89321, GHSA-vm9p-5mrq-6w5f.