Information disclosure in Cisco iOS Xe Software
CVE-2025-20221
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. This 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.
Vulnerability class: Information Disclosure
EPSS: 0.005 (37.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Cisco Ios Xe Software — versions 16.12.13, 17.1.1, 17.1.1s
- Cisco Ios_xe — versions 16.12.13, 17.1.1, 17.1.1s
Weakness classification (CWE)
References
- psirt@cisco.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-20221?
- CVE-2025-20221 is a medium-severity vulnerability in Cisco iOS Xe Software, classified under Information Disclosure. CVSS score: 5.3/10. Published 2025-05-07.
- How severe is CVE-2025-20221?
- Medium severity. CVSS v3 base score is 5.3 out of 10.