{"id":"CVE-2026-18556","state":"PUBLISHED","title":"Unauthenticated administrative account takeover","description":"Authentication bypass using an alternate path or channel vulnerability in N-able N-central allows Authentication Bypass.\n\nThis issue affects N-central: through 2026.1.","publishedAt":"2026-08-01T19:59:30.913Z","updatedAt":"2026-08-05T03:56:07.447Z","severity":{"score":8.2,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","source":"N-able"},"assigner":"N-able","products":["N-able N-central"],"affected":[{"vendor":"N-able","product":"N-central","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2026.1","versionType":"custom"}]}],"references":["https://uptime.n-able.com/","https://www.n-able.com/blog/n-central-security-update-august-2-2026","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-18556"],"weaknesses":["CWE-288"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/18xxx/CVE-2026-18556.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-18556","state":"PUBLISHED","datePublished":"2026-08-01T19:59:30.913Z","dateUpdated":"2026-08-05T03:56:07.447Z","assignerShortName":"N-able","assignerOrgId":"a5532a13-c4dd-4202-bef1-e0b8f2f8d12b","dateReserved":"2026-08-01T11:54:51.376Z"},"containers":{"cna":{"title":"Unauthenticated administrative account takeover","descriptions":[{"lang":"en","value":"Authentication bypass using an alternate path or channel vulnerability in N-able N-central allows Authentication Bypass.\n\nThis issue affects N-central: through 2026.1."}],"affected":[{"vendor":"N-able","product":"N-central","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2026.1","versionType":"custom"}]}],"references":[{"url":"https://uptime.n-able.com/"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"HIGH","baseScore":8.2,"vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-288","lang":"en","description":"CWE-288 Authentication bypass using an alternate path or channel","type":"CWE"}]}],"providerMetadata":{"shortName":"N-able","orgId":"a5532a13-c4dd-4202-bef1-e0b8f2f8d12b","dateUpdated":"2026-08-01T19:59:30.913Z"},"datePublic":"2026-08-01T19:56:00.000Z","impacts":[{"capecId":"CAPEC-115","descriptions":[{"lang":"en","value":"CAPEC-115 Authentication Bypass"}]}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.4"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://www.n-able.com/blog/n-central-security-update-august-2-2026","tags":["vendor-advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-18556","tags":["government-resource"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-04T00:00:00+00:00","options":[{"Exploitation":"active"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-18556"}}},{"other":{"type":"kev","content":{"dateAdded":"2026-08-04","reference":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-18556"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-05T03:56:07.447Z"},"timeline":[{"time":"2026-08-04T00:00:00.000Z","lang":"en","value":"CVE-2026-18556 added to CISA KEV"}]}]}}}