CVE-2018-25285 Fathom 2.4 Denial of Service via Authorization Code Buffer Overflow
Local attackers can crash the Fathom application by submitting an oversized payload to the Authorization Code field, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2018-25285?
CVE-2018-25285 is a medium-severity memory corruption vulnerability in Fathom, published on 26 Apr 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Fathom 2.4 contains a buffer overflow vulnerability in the Authorization Code field that allows local attackers to crash the application by submitting an oversized input string. Attackers can paste a 6000-byte payload into the Authorization Code field and click Activate to trigger a denial of service condition.
Weakness: CWE-120
Which versions are affected by CVE-2018-25285?
How do I fix CVE-2018-25285?
No fix has been published for CVE-2018-25285 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-2018-25285 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-25285 exists.
Sources
Also known as GHSA-p5f8-q6q5-wq69.