{"api_version":"1","generated_at":"2026-04-23T11:34:39+00:00","cve":"CVE-2022-20960","urls":{"html":"https://cve.report/CVE-2022-20960","api":"https://cve.report/api/cve/CVE-2022-20960.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2022-20960","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2022-20960"},"summary":{"title":"CVE-2022-20960","description":"A vulnerability in Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of certain TLS connections that are processed by an affected device. An attacker could exploit this vulnerability by establishing a large number of concurrent TLS connections to an affected device. A successful exploit could allow the attacker to cause the device to drop new TLS email messages that come from the associated email servers. 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This vulnerability is due to improper handling of certain TLS connections that are processed by an affected device. An attacker could exploit this vulnerability by establishing a large number of concurrent TLS connections to an affected device. A successful exploit could allow the attacker to cause the device to drop new TLS email messages that come from the associated email servers. Exploitation of this vulnerability does not cause the affected device to unexpectedly reload. The device will recover autonomously within a few hours of when the attack is halted or mitigated."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Uncontrolled Resource Consumption"}]}]},"affects":{"vendor":{"vendor_data":[{"vendor_name":"Cisco","product":{"product_data":[{"product_name":"Cisco Email Security Appliance (ESA)","version":{"version_data":[{"version_value":"10.0.1-087","version_affected":"="},{"version_value":"11.0.3-238","version_affected":"="},{"version_value":"11.1.0-069","version_affected":"="},{"version_value":"11.1.0-131","version_affected":"="},{"version_value":"11.1.0-128","version_affected":"="},{"version_value":"11.1.1-000","version_affected":"="},{"version_value":"11.1.2-000","version_affected":"="},{"version_value":"12.0.0-419","version_affected":"="},{"version_value":"12.1.0-071","version_affected":"="},{"version_value":"12.1.0-087","version_affected":"="},{"version_value":"12.1.0-089","version_affected":"="},{"version_value":"13.0.0-392","version_affected":"="},{"version_value":"13.5.1-277","version_affected":"="},{"version_value":"12.5.0-066","version_affected":"="},{"version_value":"14.0.0-698","version_affected":"="},{"version_value":"14.2.0-620","version_affected":"="}]}}]}}]}},"references":{"reference_data":[{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-dos-gdghHmbV","refsource":"MISC","name":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-dos-gdghHmbV"}]},"source":{"advisory":"cisco-sa-esa-dos-gdghHmbV","discovery":"INTERNAL","defects":["CSCwc35162"]},"exploit":[{"lang":"en","value":"The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."}],"impact":{"cvss":[{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}]}},"nvd":{"publishedDate":"2022-11-04 18:15:00","lastModifiedDate":"2024-01-25 17:15:00","problem_types":["CWE-295"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*","versionEndExcluding":"14.2.1-015","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*","versionStartIncluding":"14.3.0","versionEndExcluding":"14.3.0-020","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2022","CveId":"20960","Ordinal":"220170","Title":"CVE-2022-20960","CVE":"CVE-2022-20960","Year":"2022"},"notes":[{"CveYear":"2022","CveId":"20960","Ordinal":"1","NoteData":"** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.","Type":"Description","Title":null}]}}}