{"schema_version":"public-product-v1.1","generated_at":"2026-07-21T11:05:32Z","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","advisory":{"id":"cisco-sa-fp-ucsfi-snmp-dos-qtv69NAO","slug":"cisco-sa-fp-ucsfi-snmp-dos-qtv69nao","vendor":"Cisco","title":"Cisco Firepower 4100 Series, Firepower 9300 Security Appliances, and UCS 6300 Series Fabric Interconnects SNMP Denial of Service Vulnerability","summary":"A vulnerability in the Simple Network Management Protocol (SNMP) service of Cisco FXOS Software for Firepower 4100 Series and Firepower 9300 Security Appliances and of Cisco UCS 6300 Series Fabric Interconnects could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to the improper handling of specific SNMP requests. An attacker could exploit this vulnerability by sending a crafted SNMP request to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: This vulnerability affects all supported SNMP versions. To exploit this vulnerability through SNMPv2c or earlier, an attacker must know the SNMP community string that is configured on an affected device. To exploit this vulnerability through SNMPv3, the attacker must have valid credentials for an SNMP user who is configured on the affected device. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fp-ucsfi-snmp-dos-qtv69NAO This advisory is part of the August 2023 Cisco FXOS and NX-OS Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: August 2023 Semiannual Cisco FXOS and NX-OS Software Security Advisory Bundled Publication.","severity":"High","published_at":"2023-08-23T16:00:00Z","updated_at":"2023-08-23T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fp-ucsfi-snmp-dos-qtv69NAO","csaf_url":"https://sec.cloudapps.cisco.com/security/center/contentjson/CiscoSecurityAdvisory/cisco-sa-fp-ucsfi-snmp-dos-qtv69NAO/csaf/cisco-sa-fp-ucsfi-snmp-dos-qtv69NAO.json","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure."},"freshness":{"last_source_refreshed_at":"2026-07-21T05:16:34Z","latest_source_refresh_at":"2026-07-21T05:16:34Z","oldest_source_refresh_at":"2026-07-21T03:00:03Z","all_sources_fresh":true,"sources":[{"source":"cisco_advisories","label":"Cisco advisories","last_success_at":"2026-07-21T03:00:03Z","stale":false},{"source":"cisco_csaf","label":"Cisco CSAF","last_success_at":"2026-07-21T05:14:24Z","stale":false},{"source":"nvd_cves","label":"NVD CVEs","last_success_at":"2026-07-21T05:16:30Z","stale":false},{"source":"cisa_kev","label":"CISA KEV","last_success_at":"2026-07-21T05:16:31Z","stale":false},{"source":"first_epss","label":"EPSS","last_success_at":"2026-07-21T05:16:34Z","stale":false}]},"summary":{"cve_count":1,"visible_product_count":3,"public_evidence_count":3,"kev_count":0,"highest_epss":0.00509},"cves":[{"id":"CVE-2023-20200","kev":false,"epss":{"score":0.00509,"percentile":0.40067,"score_date":"2026-07-19","updated_at":"2026-07-20T05:46:49Z"}}],"public_evidence":[{"product":{"name":"Cisco Unified Computing System (Managed)","slug":"cisco-unified-computing-system-managed","vendor":"Cisco"},"cve":{"id":"CVE-2023-20200"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco CSAF","source_document_fetched_at":"2026-07-20T00:02:50Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco Unified Computing System (Managed)","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","exposure_verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","kev":false,"epss":{"score":0.00509,"score_date":"2026-07-19","updated_at":"2026-07-20T05:46:49Z"},"published_at":"2023-08-23T16:00:00Z","updated_at":"2023-08-23T16:00:00Z","advisory_updated_at":"2023-08-23T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fp-ucsfi-snmp-dos-qtv69NAO","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fp-ucsfi-snmp-dos-qtv69NAO"},"row_display_order":1},{"product":{"name":"Cisco Firepower 9000 Series","slug":"cisco-firepower-9000-series","vendor":"Cisco"},"cve":{"id":"CVE-2023-20200"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco CSAF","source_document_fetched_at":"2026-07-20T00:02:50Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco Firepower Extensible Operating System (FXOS) 2.2.1.63 when installed on Cisco Firepower 9000 Series; Cisco Firepower Extensible Operating System (FXOS) 2.2.1.66 when installed on Cisco Firepower 9000 Series; Cisco Firepower Extensible Operating System (FXOS) 2.2.1.70 when installed on Cisco Firepower 9000 Series; Cisco Firepower Extensible Operating System (FXOS) 2.2.2.17 when installed on Cisco Firepower 9000 Series; Cisco Firepower Extensible Operating System (FXOS) 2.2.2.19 when installed on Cisco Firepower 9000 Series; Cisco Firepower Extensible Operating System (FXOS) 2.2.2.24 when installed on Cisco Firepower 9000 Series; Cisco Firepower Extensible Operating System (FXOS) 2.2.2.26 when installed on Cisco Firepower 9000 Series; Cisco Firepower Extensible Operating System (FXOS) 2.2.2.28 when installed on Cisco Firepower 9000 Series; Cisco Firepower Extensible Operating System (FXOS) 2.2.2.54 when installed on Cisco Firepower 9000 Series; Cisco Firepower Extensible Operating System (FXOS) 2.2.2.60 when installed on Cisco Firepower 9000 Series; Cisco Firepower Extensible Operating System (FXOS) 2.3.1.56 when installed on Cisco Firepower 9000 Series; Cisco Firepower Extensible Operating System (FXOS) 2.3.1.58 when installed on Cisco Firepower 9000 Series; Cisco Firepower Extensible Operating System (FXOS) 2.3.1.66 when installed on Cisco Firepower 9000 Series; Cisco Firepower Extensible Operating System (FXOS) 2.3.1.73 when installed on Cisco Firepower 9000 Series; Cisco Firepower Extensible Operating System (FXOS) 2.3.1.75 when installed on Cisco Firepower 9000 Series; Cisco Firepower Extensible Operating System (FXOS) 2.3.1.88 when installed on Cisco Firepower 9000 Series; Cisco Firepower Extensible Operating System (FXOS) 2.3.1.91 when installed on Cisco Firepower 9000 Series; Cisco Firepower Extensible Operating System (FXOS) 2.3.1.93 when installed on Cisco Firepower 9000 Series","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","exposure_verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","kev":false,"epss":{"score":0.00509,"score_date":"2026-07-19","updated_at":"2026-07-20T05:46:49Z"},"published_at":"2023-08-23T16:00:00Z","updated_at":"2023-08-23T16:00:00Z","advisory_updated_at":"2023-08-23T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fp-ucsfi-snmp-dos-qtv69NAO","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fp-ucsfi-snmp-dos-qtv69NAO"},"row_display_order":2},{"product":{"name":"Cisco Firepower 4100 Series","slug":"cisco-firepower-4100-series","vendor":"Cisco"},"cve":{"id":"CVE-2023-20200"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco CSAF","source_document_fetched_at":"2026-07-20T00:02:50Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco Firepower Extensible Operating System (FXOS) 2.2.1.63 when installed on Cisco Firepower 4100 Series; Cisco Firepower Extensible Operating System (FXOS) 2.2.1.66 when installed on Cisco Firepower 4100 Series; Cisco Firepower Extensible Operating System (FXOS) 2.2.1.70 when installed on Cisco Firepower 4100 Series; Cisco Firepower Extensible Operating System (FXOS) 2.2.2.17 when installed on Cisco Firepower 4100 Series; Cisco Firepower Extensible Operating System (FXOS) 2.2.2.19 when installed on Cisco Firepower 4100 Series; Cisco Firepower Extensible Operating System (FXOS) 2.2.2.24 when installed on Cisco Firepower 4100 Series; Cisco Firepower Extensible Operating System (FXOS) 2.2.2.26 when installed on Cisco Firepower 4100 Series; Cisco Firepower Extensible Operating System (FXOS) 2.2.2.28 when installed on Cisco Firepower 4100 Series; Cisco Firepower Extensible Operating System (FXOS) 2.2.2.54 when installed on Cisco Firepower 4100 Series; Cisco Firepower Extensible Operating System (FXOS) 2.2.2.60 when installed on Cisco Firepower 4100 Series; Cisco Firepower Extensible Operating System (FXOS) 2.3.1.56 when installed on Cisco Firepower 4100 Series; Cisco Firepower Extensible Operating System (FXOS) 2.3.1.58 when installed on Cisco Firepower 4100 Series; Cisco Firepower Extensible Operating System (FXOS) 2.3.1.66 when installed on Cisco Firepower 4100 Series; Cisco Firepower Extensible Operating System (FXOS) 2.3.1.73 when installed on Cisco Firepower 4100 Series; Cisco Firepower Extensible Operating System (FXOS) 2.3.1.75 when installed on Cisco Firepower 4100 Series; Cisco Firepower Extensible Operating System (FXOS) 2.3.1.88 when installed on Cisco Firepower 4100 Series; Cisco Firepower Extensible Operating System (FXOS) 2.3.1.91 when installed on Cisco Firepower 4100 Series; Cisco Firepower Extensible Operating System (FXOS) 2.3.1.93 when installed on Cisco Firepower 4100 Series","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","exposure_verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","kev":false,"epss":{"score":0.00509,"score_date":"2026-07-19","updated_at":"2026-07-20T05:46:49Z"},"published_at":"2023-08-23T16:00:00Z","updated_at":"2023-08-23T16:00:00Z","advisory_updated_at":"2023-08-23T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fp-ucsfi-snmp-dos-qtv69NAO","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fp-ucsfi-snmp-dos-qtv69NAO"},"row_display_order":3}]}