{"schema":"threatline.record/2","record":{"id":"CVE-2026-107614","aliases":[],"summary":"Integer underflow in TightVNC Server cursor shape trimming leads to out-of-bounds read","details":"An integer underflow in WinCursorShapeUtils::trimTransparent() in GlavSoft TightVNC Server for Windows before 2.8.88 allows a local authenticated user to crash the server, and potentially read out-of-bounds memory, by causing a cursor shape with a width or height of zero to be processed on the DXGI capture path. The loop bound width - 1 wraps to 0xFFFFFFFF, producing an access roughly 4 GB beyond the 64 KB cursor buffer; a monochrome cursor of height 1 also becomes 0 because getCursorHeight() halves the height in place.","categories":["Unclassified"],"product":"TightVNC","vendor":"GlavSoft","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-107614","source_modified_at":"2026-10-08T14:01:01.624Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"TightVNC","vendor":"GlavSoft","versions":[{"version":"0","lessThan":"2.8.88","status":"affected","versionType":"custom"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-107614","source_modified_at":"2026-10-08T14:01:01.624Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"TightVNC","ecosystem":null},"version":"2.8.88","basis":"first unaffected version stated in the CVE record"}],"cvss":6.1,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00105,"percentile":0.01039,"score_date":"2026-10-23"},"published_at":"2026-10-08T13:39:58.297Z","modified_at":"2026-10-08T14:01:01.624Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-107614","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-08T14:01:01.624Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-107614","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://sourceforge.net/p/vnc-tight/bugs/1661/","tags":["issue-tracking"]},{"source":"CVE List","url":"https://www.tightvnc.com/whatsnew.php","tags":["release-notes","patch"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-08T14:00:49.369592Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-08T14:01:01.624Z","content_hash":"8fcd2e8791c74c52a32f3d5ec487fc6b7c587bb0d352c61963531fd0efad263d"}}