CVE-2025-10685 HTTP POST with specific higher content length leads into heap corruption
Heap-based buffer overflow in Softing smartLink webservers allows attackers to cause heap corruption via crafted HTTP POST requests.
- 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-2025-10685?
CVE-2025-10685 is a high-severity memory corruption vulnerability in Softing smartLink SW-HT, published on 16 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Heap-based buffer overflow vulnerability in Softing Industrial Automation GmbH smartLink SW-PN and smartLink SW-HT (Webserver modules) allows overflow buffers.This issue affects:
smartLink SW-PN: through 1.03
smartLink SW-HT: through 1.42
Weakness: CWE-122
Which versions are affected by CVE-2025-10685?
How do I fix CVE-2025-10685?
No fix has been published for CVE-2025-10685 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-2025-10685 being exploited?
There is no known exploitation of CVE-2025-10685 in the wild and no public exploit code.
Sources
Also known as GHSA-9r22-hfr9-vvx7.