CVE-1999-1306

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*", "matchCriteriaId": "91986F0D-94E5-4ED9-A98D-123C99FD43CE", "versionEndIncluding": "9.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Cisco IOS 9.1 and earlier does not properly handle extended IP access lists when the IP route cache is enabled and the \"established\" keyword is set, which could allow attackers to bypass filters."}], "id": "CVE-1999-1306", "lastModified": "2026-04-16T00:27:16.627", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}]}, "published": "1992-12-10T05:00:00.000", "references": [{"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory", "US Government Resource"], "url": "http://www.cert.org/advisories/CA-1992-20.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory", "US Government Resource"], "url": "http://www.cert.org/advisories/CA-1992-20.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-Other"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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