{"id":"CVE-2026-20188","aliases":["EUVD-2026-27860","GHSA-m776-2hwc-9x9m"],"status":"published","title":"Cisco Crosswork Network Controller and Cisco Network Services Orchestrator Advisory","description":"Following the initial publication of the Security Advisory about a denial of service (DoS) condition in Cisco Crosswork Network Controller and Cisco Network Services Orchestrator (NSO), additional information has been made available to the Cisco Product Security Incident Response Team (PSIRT).\r\n\r\nUpon further analysis, the Cisco PSIRT has reclassified this issue as a customer-configurable, resource management issue rather than a security vulnerability.","severity":{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","level":"none","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0031,"percentile":0.24141,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400"],"published":"2026-05-06T16:15:37Z","modified":"2026-10-26T19:10:00Z","products":[{"vendor":"cisco","product":"cisco crosswork network change automation"}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nso-dos-7Egqyc"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20188"},{"url":"https://github.com/advisories/GHSA-m776-2hwc-9x9m"}],"sources":{"cve":[{"id":"CVE-2026-20188","title":"Cisco Crosswork Network Controller and Cisco Network Services Orchestrator Advisory","description":"Following the initial publication of the Security Advisory about a denial of service (DoS) condition in Cisco Crosswork Network Controller and Cisco Network Services Orchestrator (NSO), additional information has been made available to the Cisco Product Security Incident Response Team (PSIRT).\r\n\r\nUpon further analysis, the Cisco PSIRT has reclassified this issue as a customer-configurable, resource management issue rather than a security vulnerability.","status":"published","published":"2026-05-06T16:15:37.396Z","modified":"2026-05-14T16:30:22.826Z","cvss":[{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","level":"none","assessor":"cna"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T13:35:44.571002Z"}],"euvd":[{"id":"EUVD-2026-27860","description":"Following the initial publication of the Security Advisory about a denial of service (DoS) condition in Cisco Crosswork Network Controller and Cisco Network Services Orchestrator (NSO), additional information has been made available to the Cisco Product Security Incident Response Team (PSIRT).\r\n\r\nUpon further analysis, the Cisco PSIRT has reclassified this issue as a customer-configurable, resource management issue rather than a security vulnerability.","status":"published","published":"2026-05-06T16:15:37Z","modified":"2026-05-14T16:30:22Z","updated_at":"2026-11-02T19:04:31.113278Z"}],"ghsa":[{"id":"GHSA-m776-2hwc-9x9m","title":"A vulnerability in the connection-handling mechanism of Cisco Crosswork Network Controller (CNC)...","description":"A vulnerability in the connection-handling mechanism of Cisco Crosswork Network Controller (CNC) and Cisco Network Services Orchestrator (NSO) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected system.\n\nThis vulnerability is due to an inadequate implementation of rate-limiting on incoming network connections. An attacker could exploit this vulnerability by sending a large number of connection requests to an affected system. A successful exploit could allow the attacker to exhaust available connection resources, causing Cisco CNC and Cisco NSO to become unresponsive and resulting in a DoS condition for legitimate users and dependent services. A manual reboot of the system is required to recover from this condition.","status":"published","published":"2026-05-06T18:30:31Z","modified":"2026-05-06T18:30:42Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:07:55.247215Z"}],"nvd":[{"id":"CVE-2026-20188","description":"Following the initial publication of the Security Advisory about a denial of service (DoS) condition in Cisco Crosswork Network Controller and Cisco Network Services Orchestrator (NSO), additional information has been made available to the Cisco Product Security Incident Response Team (PSIRT).\r\n\r\nUpon further analysis, the Cisco PSIRT has reclassified this issue as a customer-configurable, resource management issue rather than a security vulnerability.","status":"published","published":"2026-05-06T17:16:21.19Z","modified":"2026-10-26T19:10:00.163Z","cvss":[{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","level":"none","assessor":"secondary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:12:17.418622Z"}]}}