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 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.

CVSS v3 3.7 LOW

3.7^/10

CVSS v3 : LOW

Vector :

Exploitability : 2.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://bugzilla.redhat.com/show_bug.cgi?id=2493140
https://github.com/therealbstern/apcupsd/blob/224d19d5faa508d04267f6135fe53d50800550de/src/cgi/upsfetch.c#L240
https://sourceforge.net/projects/apcupsd/

Configurations

No configuration.

History

30 Sep 2026, 16:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-30 16:17

Updated : 2026-10-02 17:17

NVD link : CVE-2026-103436

Mitre link : CVE-2026-103436

CVE.ORG link : CVE-2026-103436

JSON object : View

Products Affected

No product.

CWE

CWE-457

Use of Uninitialized Variable

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