{"schema_version":"public-product-v1.1","generated_at":"2026-06-10T08:02:48Z","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-20190515-nxos-sisv2","slug":"cisco-sa-20190515-nxos-sisv2","vendor":"Cisco","title":"Cisco NX-OS CLI Command Software Image Signature Verification Vulnerabilities","summary":"Multiple vulnerabilities in the Image Signature Verification feature of Cisco NX-OS Software could allow an authenticated, local attacker with administrator-level credentials to install a malicious software image on an affected device. The vulnerabilities exist because software digital signatures are not properly verified during CLI command execution. An attacker could exploit these vulnerabilities to install an unsigned software image on an affected device. Note: If the device has not been patched for the vulnerability previously disclosed in the Cisco Security Advisory cisco-sa-20190306-nxos-sig-verif, a successful exploit could allow the attacker to boot a malicious software image. Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-nxos-sisv2","severity":"Medium","published_at":"2019-05-15T16:00:00Z","updated_at":"2019-05-15T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-nxos-sisv2","csaf_url":"https://sec.cloudapps.cisco.com/security/center/contentjson/CiscoSecurityAdvisory/cisco-sa-20190515-nxos-sisv2/csaf/cisco-sa-20190515-nxos-sisv2.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":"2026-05-26T00:00:03Z","latest_source_refresh_at":"2026-05-26T00:00:03Z","oldest_source_refresh_at":"2026-05-22T00:16:33Z","all_sources_fresh":false,"sources":[{"source":"cisco_advisories","label":"Cisco advisories","last_success_at":"2026-05-26T00:00:03Z","stale":true},{"source":"cisco_csaf","label":"Cisco CSAF","last_success_at":"2026-05-25T03:03:26Z","stale":true},{"source":"nvd_cves","label":"NVD CVEs","last_success_at":"2026-05-22T00:16:33Z","stale":true},{"source":"cisa_kev","label":"CISA KEV","last_success_at":"2026-05-22T00:16:34Z","stale":true},{"source":"first_epss","label":"EPSS","last_success_at":"2026-05-22T00:16:40Z","stale":true}]},"summary":{"cve_count":3,"visible_product_count":2,"public_evidence_count":6,"kev_count":0,"highest_epss":0.00066,"highest_cvss":6.7},"cves":[{"id":"CVE-2019-1813","description":"A vulnerability in the Image Signature Verification feature of Cisco NX-OS Software could allow an authenticated, local attacker with administrator-level credentials to install a malicious software image on an affected device. The vulnerability exists because software digital signatures are not properly verified during CLI command execution. An attacker could exploit this vulnerability to install an unsigned software image on an affected device.","severity":"MEDIUM","kev":false,"epss":{"score":0.00066,"percentile":0.20255,"score_date":"2026-05-19","updated_at":"2026-05-20T02:10:44Z"},"cvss_score":6.7,"cvss_source":"NVD","cwe":"CWE-347","published_at":"2019-05-15T23:29:01Z","modified_at":"2024-11-21T04:37:26Z"},{"id":"CVE-2019-1812","description":"A vulnerability in the Image Signature Verification feature of Cisco NX-OS Software could allow an authenticated, local attacker with administrator-level credentials to install a malicious software image on an affected device. The vulnerability exists because software digital signatures are not properly verified during CLI command execution. An attacker could exploit this vulnerability to install an unsigned software image on an affected device.","severity":"MEDIUM","kev":false,"epss":{"score":0.00066,"percentile":0.20255,"score_date":"2026-05-19","updated_at":"2026-05-20T02:10:44Z"},"cvss_score":6.7,"cvss_source":"NVD","cwe":"CWE-347","published_at":"2019-05-15T23:29:01Z","modified_at":"2024-11-21T04:37:26Z"},{"id":"CVE-2019-1811","description":"A vulnerability in the Image Signature Verification feature of Cisco NX-OS Software could allow an authenticated, local attacker with administrator-level credentials to install a malicious software image on an affected device. The vulnerability exists because software digital signatures are not properly verified during CLI command execution. 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