{"id":"CVE-2026-21640","state":"PUBLISHED","title":"HackerOne community member Faraz Ahmed (PakCyberbot) has reported a format string injection in the Revive Adserver settings. When specific character combinations are used in a sett","description":"HackerOne community member Faraz Ahmed (PakCyberbot) has reported a format string injection in the Revive Adserver settings. When specific character combinations are used in a setting, the admin user console could be disabled due to a fatal PHP error.","publishedAt":"2026-01-20T20:48:47.940Z","updatedAt":"2026-01-21T18:52:43.635Z","severity":{"score":2.7,"label":"Low","version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L","source":"hackerone"},"assigner":"hackerone","products":["Revive Revive Adserver"],"affected":[{"vendor":"Revive","product":"Revive Adserver","defaultStatus":"unaffected","versions":[{"version":"6","status":"affected","lessThanOrEqual":"6.0.4","versionType":"semver"}]}],"references":["https://hackerone.com/reports/3445332"],"weaknesses":["CWE-134"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/21xxx/CVE-2026-21640.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-21640","state":"PUBLISHED","datePublished":"2026-01-20T20:48:47.940Z","dateUpdated":"2026-01-21T18:52:43.635Z","assignerShortName":"hackerone","assignerOrgId":"36234546-b8fa-4601-9d6f-f4e334aa8ea1","dateReserved":"2026-01-01T15:00:02.339Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"HackerOne community member Faraz Ahmed (PakCyberbot) has reported a format string injection in the Revive Adserver settings. When specific character combinations are used in a setting, the admin user console could be disabled due to a fatal PHP error."}],"affected":[{"vendor":"Revive","product":"Revive Adserver","defaultStatus":"unaffected","versions":[{"version":"6","status":"affected","lessThanOrEqual":"6.0.4","versionType":"semver"}]}],"references":[{"url":"https://hackerone.com/reports/3445332"}],"metrics":[{"cvssV3_0":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L","baseScore":2.7,"baseSeverity":"LOW"}}],"providerMetadata":{"shortName":"hackerone","orgId":"36234546-b8fa-4601-9d6f-f4e334aa8ea1","dateUpdated":"2026-01-20T20:48:47.940Z"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-21T18:32:40.483218Z","id":"CVE-2026-21640","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-134","type":"CWE","lang":"en","description":"CWE-134 Use of Externally-Controlled Format String"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-21T18:52:43.635Z"}}]}}}