{"schema_version":"public-product-v1.1","generated_at":"2026-07-21T09:58:30Z","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-dnsmasq-dns-2021-c5mrdf3g","slug":"cisco-sa-dnsmasq-dns-2021-c5mrdf3g","vendor":"Cisco","title":"Multiple Vulnerabilities in dnsmasq DNS Forwarder Affecting Cisco Products: January 2021","summary":"A set of previously unknown vulnerabilities in the DNS forwarder implementation of dnsmasq were disclosed on January 19, 2021. The vulnerabilities are collectively known as DNSpooq. Exploitation of these vulnerabilities could result in remote code execution or denial of service (DoS), or may allow an attacker to more easily forge DNS answers that can poison DNS caches, depending on the specific vulnerability. Multiple Cisco products are affected by these vulnerabilities. Cisco will release software updates that address these vulnerabilities. Any workarounds for a specific Cisco product or service will be documented in the relevant Cisco bugs, which are identified in the Vulnerable Products section of this advisory. Note: At the time of publication, no Cisco products were found to be affected by the remote code execution and DoS vulnerabilities, which are identified by the following Common Vulnerabilities and Exposures (CVE) IDs: CVE-2020-25681  CVE-2020-25682 CVE-2020-25683 CVE-2020-25687 This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g","severity":"Medium","published_at":"2021-01-19T12:15:00Z","updated_at":"2021-08-30T17:24:42Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g","csaf_url":"https://sec.cloudapps.cisco.com/security/center/contentjson/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g/csaf/cisco-sa-dnsmasq-dns-2021-c5mrdf3g.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":7,"visible_product_count":4,"public_evidence_count":28,"kev_count":0,"highest_epss":0.86692},"cves":[{"id":"CVE-2020-25687","kev":false,"epss":{"score":0.86692,"percentile":0.99723,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"}},{"id":"CVE-2020-25683","kev":false,"epss":{"score":0.86041,"percentile":0.99708,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"}},{"id":"CVE-2020-25681","kev":false,"epss":{"score":0.81191,"percentile":0.99596,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"}},{"id":"CVE-2020-25682","kev":false,"epss":{"score":0.70754,"percentile":0.99328,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"}},{"id":"CVE-2020-25686","kev":false,"epss":{"score":0.04873,"percentile":0.91089,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"}},{"id":"CVE-2020-25684","kev":false,"epss":{"score":0.04041,"percentile":0.89503,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"}},{"id":"CVE-2020-25685","kev":false,"epss":{"score":0.02181,"percentile":0.80385,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"}}],"public_evidence":[{"product":{"name":"Cisco Identity Services Engine Software","slug":"cisco-identity-services-engine-software","vendor":"Cisco"},"cve":{"id":"CVE-2020-25687"},"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":"2026-07-20T04:06:28Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco Identity Services Engine Software","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":0.86692,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"},"published_at":"2021-01-19T12:15:00Z","updated_at":"2021-08-30T17:24:42Z","advisory_updated_at":"2021-08-30T17:24:42Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g"},"row_display_order":1},{"product":{"name":"Cisco TelePresence Video Communication Server (VCS) Expressway","slug":"cisco-telepresence-video-communication-server-vcs-expressway","vendor":"Cisco"},"cve":{"id":"CVE-2020-25687"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco 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exposure.","kev":false,"epss":{"score":0.86692,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"},"published_at":"2021-01-19T12:15:00Z","updated_at":"2021-08-30T17:24:42Z","advisory_updated_at":"2021-08-30T17:24:42Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g"},"row_display_order":2},{"product":{"name":"Cisco NX-OS Software","slug":"cisco-nx-os-software","vendor":"Cisco"},"cve":{"id":"CVE-2020-25687"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco 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exposure.","kev":false,"epss":{"score":0.86692,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"},"published_at":"2021-01-19T12:15:00Z","updated_at":"2021-08-30T17:24:42Z","advisory_updated_at":"2021-08-30T17:24:42Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g"},"row_display_order":3},{"product":{"name":"Cisco Session Initiation Protocol (SIP) Software","slug":"cisco-session-initiation-protocol-sip-software","vendor":"Cisco"},"cve":{"id":"CVE-2020-25687"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco 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exposure.","kev":false,"epss":{"score":0.86692,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"},"published_at":"2021-01-19T12:15:00Z","updated_at":"2021-08-30T17:24:42Z","advisory_updated_at":"2021-08-30T17:24:42Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g"},"row_display_order":4},{"product":{"name":"Cisco NX-OS Software","slug":"cisco-nx-os-software","vendor":"Cisco"},"cve":{"id":"CVE-2020-25683"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco 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exposure.","kev":false,"epss":{"score":0.86041,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"},"published_at":"2021-01-19T12:15:00Z","updated_at":"2021-08-30T17:24:42Z","advisory_updated_at":"2021-08-30T17:24:42Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g"},"row_display_order":5},{"product":{"name":"Cisco TelePresence Video Communication Server (VCS) Expressway","slug":"cisco-telepresence-video-communication-server-vcs-expressway","vendor":"Cisco"},"cve":{"id":"CVE-2020-25683"},"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":"2026-07-20T04:06:28Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco TelePresence Video Communication Server (VCS) Expressway","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":0.86041,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"},"published_at":"2021-01-19T12:15:00Z","updated_at":"2021-08-30T17:24:42Z","advisory_updated_at":"2021-08-30T17:24:42Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g"},"row_display_order":6},{"product":{"name":"Cisco Identity Services Engine Software","slug":"cisco-identity-services-engine-software","vendor":"Cisco"},"cve":{"id":"CVE-2020-25683"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco 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exposure.","kev":false,"epss":{"score":0.86041,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"},"published_at":"2021-01-19T12:15:00Z","updated_at":"2021-08-30T17:24:42Z","advisory_updated_at":"2021-08-30T17:24:42Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g"},"row_display_order":8},{"product":{"name":"Cisco TelePresence Video Communication Server (VCS) Expressway","slug":"cisco-telepresence-video-communication-server-vcs-expressway","vendor":"Cisco"},"cve":{"id":"CVE-2020-25681"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco 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exposure.","kev":false,"epss":{"score":0.81191,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"},"published_at":"2021-01-19T12:15:00Z","updated_at":"2021-08-30T17:24:42Z","advisory_updated_at":"2021-08-30T17:24:42Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g"},"row_display_order":9},{"product":{"name":"Cisco NX-OS Software","slug":"cisco-nx-os-software","vendor":"Cisco"},"cve":{"id":"CVE-2020-25681"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco 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exposure.","kev":false,"epss":{"score":0.81191,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"},"published_at":"2021-01-19T12:15:00Z","updated_at":"2021-08-30T17:24:42Z","advisory_updated_at":"2021-08-30T17:24:42Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g"},"row_display_order":10},{"product":{"name":"Cisco Session Initiation Protocol (SIP) Software","slug":"cisco-session-initiation-protocol-sip-software","vendor":"Cisco"},"cve":{"id":"CVE-2020-25681"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco 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exposure.","kev":false,"epss":{"score":0.81191,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"},"published_at":"2021-01-19T12:15:00Z","updated_at":"2021-08-30T17:24:42Z","advisory_updated_at":"2021-08-30T17:24:42Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g"},"row_display_order":11},{"product":{"name":"Cisco Identity Services Engine Software","slug":"cisco-identity-services-engine-software","vendor":"Cisco"},"cve":{"id":"CVE-2020-25681"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco 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exposure.","kev":false,"epss":{"score":0.81191,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"},"published_at":"2021-01-19T12:15:00Z","updated_at":"2021-08-30T17:24:42Z","advisory_updated_at":"2021-08-30T17:24:42Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnsmasq-dns-2021-c5mrdf3g"},"row_display_order":12},{"product":{"name":"Cisco TelePresence Video Communication Server (VCS) Expressway","slug":"cisco-telepresence-video-communication-server-vcs-expressway","vendor":"Cisco"},"cve":{"id":"CVE-2020-25682"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco 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