CVE-2026-78049 Systerel S2OPC AddNodes Service sopc_node_mgt_helper_internal.c out-of-bounds
Remote attackers can trigger an out-of-bounds read in S2OPC's AddNodes service, potentially causing information disclosure or crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-78049?
CVE-2026-78049 is a medium-severity memory corruption vulnerability in Systerel S2OPC, published on 22 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability has been found in Systerel S2OPC up to 1.7.3. Impacted is the function SOPC_NodeMgtHelperInternal_AddVariableNodeAttributes of the file src/ClientServer/address_space/internal/sopc_node_mgt_helper_internal.c of the component AddNodes Service. The manipulation of the argument UserAccessLevel leads to out-of-bounds read. It is possible to initiate the attack remotely. A high degree of complexity is needed for the attack. The exploitability is considered difficult. The exploit has been disclosed to the public and may be used. The identifier of the patch is aafbd37d381b618312ebdf5ddf57027f62c14fdd. It is suggested to install a patch to address this issue.
Which versions are affected by CVE-2026-78049?
How do I fix CVE-2026-78049?
No fix has been published for CVE-2026-78049 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-78049 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-78049 exists.
Sources
Also known as GHSA-cq93-frxj-593v.