{"cve":"CVE-2021-25736","nvd":{"published":"2023-10-30T03:15:07.653","modified":"2026-06-17T03:42:22.623","status":"Modified","description":"Kube-proxy\n on Windows can unintentionally forward traffic to local processes \nlistening on the same port (“spec.ports[*].port”) as a LoadBalancer \nService when the LoadBalancer controller\n does not set the “status.loadBalancer.ingress[].ip” field. Clusters \nwhere the LoadBalancer controller sets the \n“status.loadBalancer.ingress[].ip” field are unaffected.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N","score":6.3},"cwes":["CWE-114"],"references":["https://github.com/kubernetes/kubernetes/pull/99958","https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q/m/O15LOazPAgAJ","https://security.netapp.com/advisory/ntap-20231221-0003/","https://github.com/kubernetes/kubernetes/pull/99958","https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q/m/O15LOazPAgAJ"],"products":["kubernetes:kubernetes"],"source":"nvd","synced_at":"2026-10-19T21:40:11.519948003+00:00"},"epss":{"cve":"CVE-2021-25736","score":0.00915,"percentile":0.60164,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-35c7-w35f-xwgh","url":"https://osv.dev/vulnerability/GHSA-35c7-w35f-xwgh","summary":"Kube-proxy may unintentionally forward traffic","modified":"2026-09-10T03:50:03.384919778Z","packages":[{"ecosystem":"Go","name":"k8s.io/kubernetes","purl":"pkg:golang/k8s.io/kubernetes","ranges":["<1.21.0"],"fixed":["1.21.0"]}]},{"id":"GO-2023-2159","url":"https://osv.dev/vulnerability/GO-2023-2159","summary":"Kube-proxy may unintentionally forward traffic in k8s.io/kubernetes","modified":"2026-02-04T03:26:10.362Z","packages":[{"ecosystem":"Go","name":"k8s.io/kubernetes","purl":"pkg:golang/k8s.io/kubernetes","ranges":["<1.21.0"],"fixed":["1.21.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}