Cisco Patches Critical IOS XR Vulnerabilities: Time to Update and Avoid Chaos!
Cisco’s September 2025 advisory reveals three IOS XR vulnerabilities, with one allowing attackers to bypass image signature verification. Users are urged to patch swiftly, as hackers love nothing more than a good Cisco bug buffet.
Key Points:
- Cisco patched three vulnerabilities in IOS XR software.
- First flaw (CVE-2025-20248) allows attackers to bypass image signature verification.
- Second flaw (CVE-2025-20340) can cause a denial-of-service via ARP traffic.
- Third flaw (CVE-2025-20159) lets attackers bypass ACLs for SSH, NetConf, and gRPC features.
- No known exploitation in the wild, but patching is strongly advised.
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