{"id":"CVE-2026-103436","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-103436","generatedAt":"2026-10-28T01:02:37.894Z","title":"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.","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":"2026-09-30T16:17:10.000Z","lastModified":"2026-10-02T17:17:03.000Z","status":"Deferred","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":3.7,"severity":"LOW","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"},"cwe":["CWE-457"],"affected":[],"epss":{"score":0.00293,"percentile":0.21641,"date":"2026-10-26","history":[{"date":"2026-10-01","score":0.00355,"percentile":0.26824}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.29%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-30T16:17:10.000Z","detail":{"score":"3.7","severity":"LOW","publishedAt":"2026-09-30T16:17:09.700Z"},"summary":"New CVE, low severity (CVSS 3.7)."}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2493140","source":"cve@mitre.org"},{"url":"https://github.com/therealbstern/apcupsd/blob/224d19d5faa508d04267f6135fe53d50800550de/src/cgi/upsfetch.c#L240","source":"cve@mitre.org"},{"url":"https://sourceforge.net/projects/apcupsd/","source":"cve@mitre.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-103436","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}