CVE catalog
CVE-2026-103436
apcupsd through 3.14.14 discloses uninitialized stack memory in getupsvar() in src/cgi/upsfetch.c (used by upsstats.cgi, multimon.cgi, and upsfstats.cgi. On the single-field path, when the matched STA
- Severity
- Low · CVSS 3.7
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.29% · Oct 25, 2026
apcupsd through 3.14.14 discloses uninitialized stack memory in getupsvar() in src/cgi/upsfetch.c (used by upsstats.cgi, multimon.cgi, and upsfstats.cgi. On the single-field path, when the matched STATUS line has fewer than three whitespace-separated tokens, sscanf("%*s %*s %s", answer) performs no assignment but the function returns success, and thus the caller prints the uninitialized destination buffer into the HTTP response.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | apcupsd | sid | 3.14.14-8 | vulnerable |
| Debian | apcupsd | forky | 3.14.14-7 | vulnerable |
| Debian | apcupsd | trixie | 3.14.14-5 | vulnerable |
| Debian | apcupsd | bookworm | 3.14.14-3.1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | apcupsd | source | sid | (unfixed) | not yet assigned | Not reported | [1149971] |
| Debian | apcupsd | source | forky | (unfixed) | not yet assigned | Not reported | [1149971] |
| Debian | apcupsd | source | trixie | (unfixed) | not yet assigned | Not reported | [1149971] |
| Debian | apcupsd | source | bookworm | (unfixed) | not yet assigned | Not reported | [1149971] |
Notes
[trixie] apcupsd: Minor issue [bookworm] apcupsd: Minor issue; needs a malicious NIS server allowed by hosts.conf, localhost by default
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [apcupsd]Affected
Source package: [apcupsd]
Details (2)
3.14.14-3.1+b1· amd64 · bookwormAffected
nvd · apcupsd · debian · bookworm; nvd · apcupsd · debian · 12
3.14.14-3.1+b1· arm64 · bookwormAffected
nvd · apcupsd · debian · bookworm; nvd · apcupsd · debian · 12
- [apcupsd-cgi]Affected
Source package: [apcupsd]
Details (2)
3.14.14-3.1+b1· amd64 · bookwormAffected
nvd · apcupsd · debian · bookworm; nvd · apcupsd · debian · 12
3.14.14-3.1+b1· arm64 · bookwormAffected
nvd · apcupsd · debian · bookworm; nvd · apcupsd · debian · 12
- [apcupsd-doc]Affected
Source package: [apcupsd]
Details (2)
3.14.14-3.1· all · bookwormAffected
nvd · apcupsd · debian · bookworm; nvd · apcupsd · debian · 12
3.14.14-3.1· all · bookwormAffected
nvd · apcupsd · debian · bookworm; nvd · apcupsd · debian · 12
[Debian 13 (Trixie)]
- [apcupsd]Affected
Details (2)
3.14.14-5· amd64 · trixieAffected
nvd · apcupsd · debian · 13
3.14.14-5· arm64 · trixieAffected
nvd · apcupsd · debian · 13
- [apcupsd-cgi]Affected
Source package: [apcupsd]
Details (2)
3.14.14-5· amd64 · trixieAffected
nvd · apcupsd · debian · 13
3.14.14-5· arm64 · trixieAffected
nvd · apcupsd · debian · 13
- [apcupsd-doc]Affected
Source package: [apcupsd]
Details (2)
3.14.14-5· all · trixieAffected
nvd · apcupsd · debian · 13
3.14.14-5· all · trixieAffected
nvd · apcupsd · debian · 13
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-103436]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-103436]
- [https://security-tracker.debian.org/tracker/CVE-2026-103436]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-103436.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]