{"id":"CVE-2026-107733","title":"SumatraPDF is a multi-format reader for Windows","summary":"SumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, FrameOnCommand() handles CmdExec by passing a null current-tab pointer to RunWithExe(), which dereferences WindowTab::filePath. A local process in the same interactiv…","severity":"medium","cwe":["CWE-476"],"published":"2026-10-08","updated":"2026-10-14","sourceUpdated":"2026-10-14T02:16:58.120","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-107733","references":[{"url":"https://github.com/sumatrapdfreader/sumatrapdf/commit/013ad659c7de13fa15624d1f8a24e3231c50516b","label":"security-advisories@github.com"},{"url":"https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-p2ph-2rvm-q37m","label":"security-advisories@github.com"},{"url":"https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-p2ph-2rvm-q37m","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00156,"epssPercentile":0.04707,"ingestedAt":"2026-10-09T00:19:50.971Z","vendor":"sumatrapdfreader","product":"sumatrapdf","affected":["sumatrapdf <= 3.6.1"],"cvss":6.8,"cvssVector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-14T01:32:51.550764Z"},"cvssSource":"cna","slug":"CVE-2026-107733","body":"## Overview\n\nSumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, FrameOnCommand() handles CmdExec by passing a null current-tab pointer to RunWithExe(), which dereferences WindowTab::filePath. A local process in the same interactive Windows session, at an integrity level greater than or equal to SumatraPDF's under Windows UIPI, can dispatch CmdExec over DDE or WM_COPYDATA while no document tab is open, causing abrupt process termination and loss of unsaved state. No broader impact is claimed beyond the advisory-supported conditions. No fixed version is available as of this review.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":37.4,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":221187,"id":"CVE-2026-107733","ts":1792030804275,"field":"exploit_available","old":"false","new":"true"},{"seq":221186,"id":"CVE-2026-107733","ts":1792030804275,"field":"cvss","old":null,"new":"6.8"},{"seq":221185,"id":"CVE-2026-107733","ts":1792030804275,"field":"severity","old":"none","new":"medium"}]}