CVE-2025-20221 Security feature bypass in Cisco IOS XE Software
Unauthenticated remote attackers can bypass Layer 3 and Layer 4 traffic filters on Cisco IOS XE SD-WAN devices by sending crafted packets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-20221?
CVE-2025-20221 is a medium-severity vulnerability in Cisco Ios Xe, published on 7 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-200
Which versions are affected by CVE-2025-20221?
It affects 1 product.
Products include Cisco Ios Xe.
How do I fix CVE-2025-20221?
No fix has been published for CVE-2025-20221 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-20221 being exploited?
There is no known exploitation of CVE-2025-20221 in the wild and no public exploit code.
Other vulnerabilities in Cisco Ios Xe
- CVE-2023-20198 Cisco IOS XE Web UI Privilege Escalation
- CVE-2018-0151 Cisco IOS Software and Cisco IOS XE Software Quality of Service Remote Code Execution
- CVE-2023-20273 Cisco IOS XE Web UI Command Injection
- CVE-2025-20188 Hardcoded credentials in Cisco IOS XE Software
- CVE-2021-34770 Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Remote Code Execution Vulnerability
Sources
Also known as GHSA-5983-2qrf-rph2.