CVE-2026-103432 Memory corruption in apcupsd
A stack-based buffer overflow in apcupsd CGI scripts allows attackers to execute arbitrary code or cause denial of service.
- 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-2026-103432?
CVE-2026-103432 is a high-severity memory corruption vulnerability in apcupsd, published on 30 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
apcupsd through 3.14.14 has an sscanf stack-based buffer overflow in getupsvar() in src/cgi/upsfetch.c (used by upsstats.cgi, multimon.cgi, and upsfstats.cgi), a related issue to CVE-2026-15544.
Weakness: CWE-121
Which versions are affected by CVE-2026-103432?
How do I fix CVE-2026-103432?
No fix has been published for CVE-2026-103432 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-2026-103432 being exploited?
There is no known exploitation of CVE-2026-103432 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-103432, GHSA-mx74-w6g6-vppg, UBUNTU-CVE-2026-103432.