High severity · published Sep 30, 2026
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…
8.1
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AP
apcupsd · apcupsd
through 3.14.14 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-103432
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-103432
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2493140
github.com
https://github.com/therealbstern/apcupsd/blob/224d19d5faa508d04267f6135fe53d50800550de/src/cgi/upsfetch.c#L240
sourceforge.net
https://sourceforge.net/projects/apcupsd/
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