Description
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.
Published: 2026-09-30
Score: 3.7 Low
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 30 Sep 2026 16:00:00 +0000

Type Values Removed Values Added
Description 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.
First Time appeared Apcupsd
Apcupsd apcupsd
Weaknesses CWE-457
CPEs cpe:2.3:a:apcupsd:apcupsd:*:*:*:*:*:*:*:*
Vendors & Products Apcupsd
Apcupsd apcupsd
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'}

Subscriptions

Apcupsd Apcupsd
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-30T15:38:48.231Z

Reserved: 2026-09-30T15:38:47.884Z

Link: CVE-2026-103436

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-09-30T16:17:09.700

Modified: 2026-09-30T17:32:07.107

Link: CVE-2026-103436

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-457

    Use of Uninitialized Variable