CVE-2025-62691 Memory corruption in Security Point (Windows) of MaLion
Remote unauthenticated attackers can execute arbitrary code with SYSTEM privileges via a stack-based buffer overflow in HTTP header processing.
- 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-2025-62691?
CVE-2025-62691 is a critical memory corruption vulnerability in Intercom, Inc. Security Point (Windows) of MaLion, published on 25 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Security Point (Windows) of MaLion and MaLionCloud contains a stack-based buffer overflow vulnerability in processing HTTP headers. Receiving a specially crafted request from a remote unauthenticated attacker could lead to arbitrary code execution with SYSTEM privilege.
Weakness: CWE-121
Which versions are affected by CVE-2025-62691?
How do I fix CVE-2025-62691?
No fix has been published for CVE-2025-62691 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-2025-62691 being exploited?
There is no known exploitation of CVE-2025-62691 in the wild and no public exploit code.
Sources
Also known as GHSA-2fg2-rf2v-2fh3.