# IOS XR vulnerabilities > IOS XR is made by Cisco. We track 188 published vulnerabilities listed under that exact name, across 320 versions. 10 of them are on the list of flaws known to be exploited, the newest added on 10 October 2023. Cisco lists newer releases under their own names, such as Ios XR Firmware, so check those pages too. Canonical page: https://www.precursorintelligence.com/product/cisco/ios_xr ## At a glance - **Made by:** [Cisco](https://www.precursorintelligence.com/vendors/cisco) - **Published vulnerabilities:** 188 - **Known to be exploited:** 10 (listed under the name IOS XR) - **Versions tracked:** 320 - **Most recently added to the known-exploited list:** [CVE-2023-44487](https://www.precursorintelligence.com/what-is/cve-2023-44487), 10 October 2023. We keep watching the list. ## Is IOS XR listed under other names? Cisco also lists IOS XR under more specific names, such as Ios XR Firmware and Ios XR Software. Flaws listed only under those names are counted on their own pages, not here. - [Ios XR Firmware](https://www.precursorintelligence.com/product/cisco/ios_xr_firmware): 1 published vulnerability - [Ios XR Software](https://www.precursorintelligence.com/product/cisco/ios_xr_software): 1 published vulnerability ## Which versions of IOS XR do the exploited flaws hit? Each exploited flaw lists the versions it affects, as published. "before 7.11.2" means every version up to, but not including, 7.11.2. - [CVE-2023-44487](https://www.precursorintelligence.com/what-is/cve-2023-44487) (HTTP/2 Rapid Reset Attack Vulnerability): before 7.11.2 - [CVE-2016-6415](https://www.precursorintelligence.com/what-is/cve-2016-6415) (Cisco IOS, IOS XR, and IOS XE IKEv1 Information Disclosure Vulnerability): 4.3.0 to 4.3.4, 5.0.0 to before 5.3.0 - [CVE-2009-2055](https://www.precursorintelligence.com/what-is/cve-2009-2055) (Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability): 3.4, 3.4.0, 3.4.1, 3.4.2, 3.4.3, 3.5, 3.5.2, 3.5.3, 3.5.4, 3.6.0, 3.6.1, 3.6.2, 3.6.3, 3.7.0, 3.7.1, 3.7.2, 3.7.3, 3.8.0, 3.8.1 - [CVE-2010-3035](https://www.precursorintelligence.com/what-is/cve-2010-3035) (Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability): 3.4.0 to 3.9.1 - [CVE-2018-0175](https://www.precursorintelligence.com/what-is/cve-2018-0175) (Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability): 15.4(3)m4.1 - [CVE-2018-0167](https://www.precursorintelligence.com/what-is/cve-2018-0167) (Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability): 4.1 to before 5.1.3 - [CVE-2020-3118](https://www.precursorintelligence.com/what-is/cve-2020-3118) (Cisco IOS XR Software Discovery Protocol Format String Vulnerability): 5.2.5, 6.4.2, 6.5.3, 6.6.0 to before 6.6.12, 6.6.25, 7.0.0 to before 7.0.2 - [CVE-2020-3566](https://www.precursorintelligence.com/what-is/cve-2020-3566) (Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability): 6.4.2 - [CVE-2020-3569](https://www.precursorintelligence.com/what-is/cve-2020-3569) (Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability): before 6.5.2, 6.5.3, 6.6.2, 6.6.3, 7.0.2, 7.1.2, 7.1.15 1 more exploited flaw names IOS XR without a version of its own (for example as the system other affected software runs on). They are in the list below. ## Which IOS XR vulnerabilities are being exploited? 10 flaws are on the government list of vulnerabilities known to be exploited, newest first: - [CVE-2023-44487](https://www.precursorintelligence.com/what-is/cve-2023-44487): HTTP/2 Rapid Reset Attack Vulnerability. High, CVSS 7.5, chance of use in 30 days >99%, known exploited since 10 October 2023. - [CVE-2016-6415](https://www.precursorintelligence.com/what-is/cve-2016-6415): Cisco IOS, IOS XR, and IOS XE IKEv1 Information Disclosure Vulnerability. High, CVSS 7.5, chance of use in 30 days 88%, known exploited since 19 May 2023. - [CVE-2022-20821](https://www.precursorintelligence.com/what-is/cve-2022-20821): Cisco IOS XR Open Port Vulnerability. Medium, CVSS 6.5, chance of use in 30 days 11%, known exploited since 23 May 2022. - [CVE-2009-2055](https://www.precursorintelligence.com/what-is/cve-2009-2055): Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability. Medium, CVSS 5.9, chance of use in 30 days 3.3%, known exploited since 25 March 2022. - [CVE-2010-3035](https://www.precursorintelligence.com/what-is/cve-2010-3035): Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability. High, CVSS 7.5, chance of use in 30 days 5.7%, known exploited since 25 March 2022. - [CVE-2018-0175](https://www.precursorintelligence.com/what-is/cve-2018-0175): Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability. High, CVSS 8.0, chance of use in 30 days 3.5%, known exploited since 3 March 2022. - [CVE-2018-0167](https://www.precursorintelligence.com/what-is/cve-2018-0167): Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability. High, CVSS 8.8, chance of use in 30 days 3.4%, known exploited since 3 March 2022. - [CVE-2020-3118](https://www.precursorintelligence.com/what-is/cve-2020-3118): Cisco IOS XR Software Discovery Protocol Format String Vulnerability. High, CVSS 8.8, chance of use in 30 days 12%, known exploited since 3 November 2021. - [CVE-2020-3566](https://www.precursorintelligence.com/what-is/cve-2020-3566): Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability. High, CVSS 8.6, chance of use in 30 days 3.7%, known exploited since 3 November 2021. - [CVE-2020-3569](https://www.precursorintelligence.com/what-is/cve-2020-3569): Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability. High, CVSS 8.6, chance of use in 30 days 3.3%, known exploited since 3 November 2021. ## Which IOS XR flaws are most likely to be used? Ranked by the latest exploit-likelihood forecast (the chance each flaw is used in an attack in the next 30 days): - [CVE-2023-44487](https://www.precursorintelligence.com/what-is/cve-2023-44487): >99%, High (CVSS 7.5), known exploited - [CVE-2016-6415](https://www.precursorintelligence.com/what-is/cve-2016-6415): 88%, High (CVSS 7.5), known exploited - [CVE-2007-4430](https://www.precursorintelligence.com/what-is/cve-2007-4430): 13%, Medium (CVSS 5.0) - [CVE-2020-3118](https://www.precursorintelligence.com/what-is/cve-2020-3118): 12%, High (CVSS 8.8), known exploited - [CVE-2022-20821](https://www.precursorintelligence.com/what-is/cve-2022-20821): 11%, Medium (CVSS 6.5), known exploited - [CVE-2019-1681](https://www.precursorintelligence.com/what-is/cve-2019-1681): 6.3%, High (CVSS 7.5) - [CVE-2010-3035](https://www.precursorintelligence.com/what-is/cve-2010-3035): 5.7%, High (CVSS 7.5), known exploited - [CVE-2009-0629](https://www.precursorintelligence.com/what-is/cve-2009-0629): 4.0%, Medium (CVSS 5.4) - [CVE-2018-0418](https://www.precursorintelligence.com/what-is/cve-2018-0418): 4.0%, High (CVSS 8.6) ## Questions ### How many vulnerabilities does IOS XR have? We track 188 published vulnerabilities listed under the name IOS XR, across 320 versions. The most recent IOS XR flaw added to the known-exploited list is CVE-2023-44487, on 10 October 2023. ### Which IOS XR vulnerabilities are being exploited? 10 are on the list of flaws known to be exploited. The most recently added are CVE-2023-44487, CVE-2016-6415 and CVE-2022-20821. ### Why are newer IOS XR flaws missing from this page? Cisco also lists IOS XR under more specific names, such as Ios XR Firmware and Ios XR Software. Flaws listed only under those names are counted on their own pages, not here. Open the release you run to see its own list. ### Which versions of IOS XR do the exploited flaws affect? Each flaw names its own versions, usually as ranges. The newest, CVE-2023-44487, affects before 7.11.2. The versions for every exploited flaw are listed on this page. ### How do I get alerts for IOS XR? Create a Precursor Intelligence account and track IOS XR. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook. ## Running IOS XR? Precursor Intelligence keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.precursorintelligence.com/register Book a demo: https://www.precursorintelligence.com/contact