{"id":"CVE-2025-20221","title":"Cisco IOS XE cEdge Information Disclosure Vulnerability","summary":"A vulnerability in the packet filtering features of Cisco IOS XE SD-WAN Software could allow an unauthenticated, remote attacker to bypass Layer 3 and Layer 4 traffic filters.\r\n\r\nThis vulnerability is due to improper traffic filtering cond…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cvssSource":"vendor","vendor":"Cisco","product":"Cisco IOS XE Software","affected":["ios_xe_software 17.1.1","ios_xe_software 17.2.1","ios_xe_software 17.3.1","ios_xe_software 17.4.1","ios_xe_software 17.5.1","ios_xe_software 17.6.1","ios_xe_software 17.1.1s","ios_xe_software 17.3.2","ios_xe_software 17.2.1r","ios_xe_software 17.1.2","ios_xe_software 17.2.1a","ios_xe_software 17.1.1t","ios_xe_software 17.7.1","ios_xe_software 17.2.1v","ios_xe_software 17.10.1","ios_xe_software 17.3.3","ios_xe_software 17.4.2","ios_xe_software 17.8.1","ios_xe_software 17.9.1","ios_xe_software 17.2.2","ios_xe_software 17.3.1a","ios_xe_software 17.3.2a","ios_xe_software 17.1.3","ios_xe_software 17.4.1a","ios_xe_software 17.4.1b","ios_xe_software 17.2.3","ios_xe_software 17.3.4","ios_xe_software 17.5.1a","ios_xe_software 17.3.5","ios_xe_software 17.6.2","ios_xe_software 17.3.4a","ios_xe_software 17.6.1a","ios_xe_software 17.3.6","ios_xe_software 17.7.1a","ios_xe_software 17.6.3","ios_xe_software 17.8.1a","ios_xe_software 17.7.2","ios_xe_software 17.6.3a","ios_xe_software 17.11.1","ios_xe_software 17.12.1"],"published":"2025-05-07","updated":"2025-09-22","sourceUpdated":"2025-09-22T14:12:28+00:00","source":"CSAF","sourceUrl":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-bypass-HHUVujdn","references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-bypass-HHUVujdn"},{"url":"https://software.cisco.com"}],"tags":["csaf","vendor-advisory","cisco"],"epss":0.00641,"epssPercentile":0.50516,"ingestedAt":"2026-10-15T11:50:11.860Z","slug":"CVE-2025-20221","body":"## Overview\n\nA vulnerability in the packet filtering features of Cisco IOS XE SD-WAN Software could allow an unauthenticated, remote attacker to bypass Layer 3 and Layer 4 traffic filters.\r\n\r\nThis vulnerability is due to improper traffic filtering conditions on an affected device. An attacker could exploit this vulnerability by sending a crafted packet to the affected device. A successful exploit could allow the attacker to bypass the Layer 3 and Layer 4 traffic filters and inject a crafted packet into the network.\r\n\r\nCisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability.\r\n\r\n\r\n\r\nThis advisory is part of the May 2025 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: May 2025 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication [\"https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75279\"].\n\n## Vendor advisories\n\n- **cisco-sa-snmp-bypass-HHUVujdn** · Cisco · affected: Cisco IOS XE Software (86 versions) · updated 2025-09-22 · [advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-bypass-HHUVujdn)\n\n**Cisco IOS XE SD-WAN Software Packet Filtering Bypass Vulnerability**. Released 2025-05-07, updated 2025-09-22.\n\nAffected:\n\n- Cisco IOS XE Software 17.1.1\n- Cisco IOS XE Software 17.2.1\n- Cisco IOS XE Software 17.3.1\n- Cisco IOS XE Software 17.4.1\n- Cisco IOS XE Software 17.5.1\n- Cisco IOS XE Software 17.6.1\n- Cisco IOS XE Software 17.1.1s\n- Cisco IOS XE Software 17.3.2\n- Cisco IOS XE Software 17.2.1r\n- Cisco IOS XE Software 17.1.2\n- Cisco IOS XE Software 17.2.1a\n- Cisco IOS XE Software 17.1.1t\n- Cisco IOS XE Software 17.7.1\n- Cisco IOS XE Software 17.2.1v\n- Cisco IOS XE Software 17.10.1\n- Cisco IOS XE Software 17.3.3\n- Cisco IOS XE Software 17.4.2\n- Cisco IOS XE Software 17.8.1\n- Cisco IOS XE Software 17.9.1\n- Cisco IOS XE Software 17.2.2\n- Cisco IOS XE Software 17.3.1a\n- Cisco IOS XE Software 17.3.2a\n- Cisco IOS XE Software 17.1.3\n- Cisco IOS XE Software 17.4.1a\n- Cisco IOS XE Software 17.4.1b\n- Cisco IOS XE Software 17.2.3\n- Cisco IOS XE Software 17.3.4\n- Cisco IOS XE Software 17.5.1a\n- Cisco IOS XE Software 17.3.5\n- Cisco IOS XE Software 17.6.2\n- Cisco IOS XE Software 17.3.4a\n- Cisco IOS XE Software 17.6.1a\n- Cisco IOS XE Software 17.3.6\n- Cisco IOS XE Software 17.7.1a\n- Cisco IOS XE Software 17.6.3\n- Cisco IOS XE Software 17.8.1a\n- Cisco IOS XE Software 17.7.2\n- Cisco IOS XE Software 17.6.3a\n- Cisco IOS XE Software 17.11.1\n- Cisco IOS XE Software 17.12.1\n\n## Remediation\n\nCisco has released software updates that address this vulnerability. https://software.cisco.com","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}