{"cve":"CVE-2012-3946","nvd":{"published":"2014-04-24T10:55:02.290","modified":"2026-06-16T23:44:06.567","status":"Modified","description":"Cisco IOS before 15.3(2)S allows remote attackers to bypass interface ACL restrictions in opportunistic circumstances by sending IPv6 packets in an unspecified scenario in which expected packet drops do not occur for \"a small percentage\" of the packets, aka Bug ID CSCty73682.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-264"],"references":["http://www.cisco.com/c/en/us/td/docs/ios/15_3s/release/notes/15_3s_rel_notes/15_3s_caveats_15_3_2s.html","http://www.cisco.com/c/en/us/td/docs/ios/15_3s/release/notes/15_3s_rel_notes/15_3s_caveats_15_3_2s.html"],"products":["cisco:ios"],"source":"nvd","synced_at":"2026-10-19T20:32:06.812358378+00:00"},"epss":{"cve":"CVE-2012-3946","score":0.01932,"percentile":0.80028,"date":"2026-11-01"},"kev":null,"osv":[],"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."]}