CVE-2026-67873 Memory corruption in n/a
A heap-based buffer overflow in lib60870-C allows attackers to execute arbitrary code or cause denial of service via crafted FileSegment ASDU encoding.
- 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-2026-67873?
CVE-2026-67873 is a critical memory corruption vulnerability in n/a, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A heap-based buffer overflow exists in lib60870-C 2.4.0 in the server-side FileSegment ASDU encoding path. The issue occurs because FileSegment_encode() validates only the standalone segment length via FileSegment_GetMaxDataSize() and does not verify the residual capacity of the current ASDU frame before encoding object fields and segment data
Weakness: CWE-122
Which versions are affected by CVE-2026-67873?
How do I fix CVE-2026-67873?
No fix has been published for CVE-2026-67873 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-2026-67873 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67873 exists.
Sources
Also known as GHSA-vgf8-x653-r7r2.