What is CVE-2026-103432?

CVE-2026-103432 is a high-severity vulnerability in Apcupsd, classified under Stack-based Buffer Overflow. CVSS score: 8.1/10. Published 2026-09-30.

How severe is CVE-2026-103432?

High severity. CVSS v3 base score is 8.1 out of 10.

Buffer overflow in Apcupsd

CVE-2026-103432

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.

Vulnerability class: Buffer Overflow

Published 2026-09-30 · last modified 2026-09-30.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Apcupsd

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

bugzilla.redhat.com/show_bug.cgi
github.com/therealbstern/apcupsd/blob/224d19d5faa508d04267f6135fe53d50800550de/…
sourceforge.net/projects/apcupsd/

Frequently asked questions

What is CVE-2026-103432?: CVE-2026-103432 is a high-severity vulnerability in Apcupsd, classified under Stack-based Buffer Overflow. CVSS score: 8.1/10. Published 2026-09-30.
How severe is CVE-2026-103432?: High severity. CVSS v3 base score is 8.1 out of 10.