{"containers":{"cna":{"affected":[{"product":"BIG-IP","vendor":"n/a","versions":[{"status":"affected","version":"16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, 12.1.x before 12.1.5.3"}]}],"descriptions":[{"lang":"en","value":"On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, and 12.1.x before 12.1.5.3, undisclosed requests to a virtual server may be incorrectly handled by the Traffic Management Microkernel (TMM) URI normalization, which may trigger a buffer overflow, resulting in a DoS attack. In certain situations, it may theoretically allow bypass of URL based access control or remote code execution (RCE). Note: Software versions which have reached End of Software Development (EoSD) are not evaluated."}],"problemTypes":[{"descriptions":[{"description":"RCE","lang":"en","type":"text"}]}],"providerMetadata":{"dateUpdated":"2021-03-31T17:23:14.000Z","orgId":"9dacffd4-cb11-413f-8451-fbbfd4ddc0ab","shortName":"f5"},"references":[{"tags":["x_refsource_MISC"],"url":"https://support.f5.com/csp/article/K56715231"}],"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"f5sirt@f5.com","ID":"CVE-2021-22991","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"BIG-IP","version":{"version_data":[{"version_value":"16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, 12.1.x before 12.1.5.3"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, and 12.1.x before 12.1.5.3, undisclosed requests to a virtual server may be incorrectly handled by the Traffic Management Microkernel (TMM) URI normalization, which may trigger a buffer overflow, resulting in a DoS attack. In certain situations, it may theoretically allow bypass of URL based access control or remote code execution (RCE). Note: Software versions which have reached End of Software Development (EoSD) are not evaluated."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"RCE"}]}]},"references":{"reference_data":[{"name":"https://support.f5.com/csp/article/K56715231","refsource":"MISC","url":"https://support.f5.com/csp/article/K56715231"}]}}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-03T18:58:26.089Z"},"title":"CVE Program Container","references":[{"tags":["x_refsource_MISC","x_transferred"],"url":"https://support.f5.com/csp/article/K56715231"}]},{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.8,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2021-22991","role":"CISA Coordinator","options":[{"Exploitation":"active"},{"Automatable":"yes"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2025-01-29T20:33:09.572716Z"}}},{"other":{"type":"kev","content":{"dateAdded":"2022-01-18","reference":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22991"}}}],"references":[{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22991","tags":["government-resource"]}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-119","description":"CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer"}]}],"timeline":[{"time":"2022-01-18T00:00:00.000Z","lang":"en","value":"CVE-2021-22991 added to CISA KEV"}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-10-21T23:25:50.646Z"}}]},"cveMetadata":{"assignerOrgId":"9dacffd4-cb11-413f-8451-fbbfd4ddc0ab","assignerShortName":"f5","cveId":"CVE-2021-22991","datePublished":"2021-03-31T17:23:14.000Z","dateReserved":"2021-01-06T00:00:00.000Z","dateUpdated":"2025-10-21T23:25:50.646Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"}