What’s Vulnerable › Vulnerabilities
CVE-2025-20221
- Severity: critical (CVSS 9.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-05-07 · updated 2026-06-17
- Weakness: CWE-200
Description
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.
Affected products
- Cisco IOS XE: 16.12.13, 17.1.1, 17.1.1s, 17.1.1t, 17.1.3, 17.2.1 (+83)
References
Get alerted when CVE-2025-20221 or the next vulnerability affects your stack