Cisco Ios Xr vulnerabilities
200 published vulnerabilities in Cisco Ios Xr, 10 of them exploited in the wild. The most were published in 2021 (24), and 6 so far in 2026.
Cisco Ios Xr vulnerabilities by year
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Most exploited Cisco Ios Xr vulnerabilities
- CVE-2020-3118 Cisco IOS XR Software Discovery Protocol Format String
- CVE-2018-0167 Cisco IOS, XR, and XE Software Buffer Overflow
- CVE-2020-3569 Cisco IOS XR Software DVMRP Memory Exhaustion
- CVE-2020-3566 Cisco IOS XR Software DVMRP Memory Exhaustion
- CVE-2018-0175 Cisco IOS, XR, and XE Software Buffer Overflow
- CVE-2023-44487 HTTP/2 Rapid Reset Attack
- CVE-2016-6415 Cisco IOS, IOS XR, and IOS XE IKEv1 Information Disclosure
- CVE-2010-3035 Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service
- CVE-2022-20821 Cisco IOS XR Open Port
- CVE-2009-2055 Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service
- CVE-2026-20274 Cisco IOS XR Software Security Hardening Release: September 2026
- CVE-2019-1710 Cisco IOS XR 64-Bit Software for Cisco ASR 9000 Series Aggregation Services Routers Network Isolation Vulnerability
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