{"id":"CVE-2019-15691","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-15691","generatedAt":"2026-10-28T22:44:18.656Z","title":"TigerVNC version prior to 1.10.1 is vulnerable to stack use-after-return, which occurs due to incorrect usage of stack memory in ZRLEDecoder.","description":"TigerVNC version prior to 1.10.1 is vulnerable to stack use-after-return, which occurs due to incorrect usage of stack memory in ZRLEDecoder. If decoding routine would throw an exception, ZRLEDecoder may try to access stack variable, which has been already freed during the process of stack unwinding. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.","published":"2019-12-26T15:15:11.000Z","lastModified":"2026-06-17T02:20:53.000Z","status":"Modified","sourceIdentifier":"vulnerability@kaspersky.com","cvss":{"version":"3.1","score":7.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-825","CWE-672"],"affected":["tigervnc/tigervnc","opensuse/leap"],"epss":{"score":0.04719,"percentile":0.91784,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (4.72%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00039.html","tags":["Third Party Advisory"],"source":"vulnerability@kaspersky.com"},{"url":"https://github.com/CendioOssman/tigervnc/commit/d61a767d6842b530ffb532ddd5a3d233119aad40","tags":["Patch","Third Party Advisory"],"source":"vulnerability@kaspersky.com"},{"url":"https://github.com/TigerVNC/tigervnc/releases/tag/v1.10.1","tags":["Release Notes","Third Party Advisory"],"source":"vulnerability@kaspersky.com"},{"url":"https://www.openwall.com/lists/oss-security/2019/12/20/2","tags":["Exploit","Mailing List","Third Party Advisory"],"source":"vulnerability@kaspersky.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00039.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/CendioOssman/tigervnc/commit/d61a767d6842b530ffb532ddd5a3d233119aad40","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/TigerVNC/tigervnc/releases/tag/v1.10.1","tags":["Release Notes","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.openwall.com/lists/oss-security/2019/12/20/2","tags":["Exploit","Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-15691","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."}