CVE-2026-90572 davenardella snap7 s7_micro_client.cpp opUpload memory corruption
Remote attackers can trigger memory corruption in the Snap7 library via manipulated data length arguments, potentially leading to code execution or crashes.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90572?
CVE-2026-90572 is a medium-severity memory corruption vulnerability in davenardella snap7, published on 13 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A vulnerability was determined in davenardella snap7 up to 1.4.3. The affected element is the function TSnap7MicroClient::opUpload of the file src/core/s7_micro_client.cpp. Executing a manipulation of the argument DataLen can lead to memory corruption. The attack can be executed remotely. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.
Weakness: CWE-119
Which versions are affected by CVE-2026-90572?
How do I fix CVE-2026-90572?
No fix has been published for CVE-2026-90572 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-2026-90572 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90572 exists.
Sources
Also known as GHSA-xrq6-q643-mcv3.