{"id":"CVE-2020-36402","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-36402","generatedAt":"2026-10-27T22:25:16.349Z","title":"Solidity 0.7.5 has a stack-use-after-return issue in smtutil::CHCSmtLib2Interface::querySolver.","description":"Solidity 0.7.5 has a stack-use-after-return issue in smtutil::CHCSmtLib2Interface::querySolver. NOTE: c39a5e2b7a3fabbf687f53a2823fc087be6c1a7e is cited in the OSV \"fixed\" field but does not have a code change.","published":"2021-07-01T03:15:08.000Z","lastModified":"2026-06-17T03:15:25.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-787"],"affected":["soliditylang/solidity"],"epss":{"score":0.0096,"percentile":0.61278,"date":"2026-10-26","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 (0.96%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26997","tags":["Exploit","Issue Tracking","Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/ethereum/solidity/commit/c39a5e2b7a3fabbf687f53a2823fc087be6c1a7e","tags":["Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/google/oss-fuzz-vulns/blob/main/vulns/solidity/OSV-2020-2131.yaml","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26997","tags":["Exploit","Issue Tracking","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/ethereum/solidity/commit/c39a5e2b7a3fabbf687f53a2823fc087be6c1a7e","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/google/oss-fuzz-vulns/blob/main/vulns/solidity/OSV-2020-2131.yaml","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-36402","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."}