IOS XR vulnerabilitiesAnd the versions its exploited flaws hit.
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.
The most recent IOS XR flaw added to the known-exploited list is CVE-2023-44487, on 10 October 2023. We keep watching the known-exploited list.
Is IOS XR listed under other names? Yes.
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. If you run one of these, open its page for its own exploited flaws.
Which versions of IOS XR do the exploited flaws hit?
Each exploited flaw lists the versions it affects, usually as ranges. "before 7.11.2" means every version up to, but not including, 7.11.2. Find your version, then patch.
- CVE-2023-44487Exploited list, 10 Oct 2023
HTTP/2 Rapid Reset Attack Vulnerability
before 7.11.2 - CVE-2016-6415Exploited list, 19 May 2023
Cisco IOS, IOS XR, and IOS XE IKEv1 Information Disclosure Vulnerability
4.3.0 to 4.3.45.0.0 to before 5.3.0 - CVE-2009-2055Exploited list, 25 Mar 2022
Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability
3.43.4.03.4.13.4.23.4.33.53.5.23.5.3 - CVE-2010-3035Exploited list, 25 Mar 2022
Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability
3.4.0 to 3.9.1 - CVE-2018-0175Exploited list, 3 Mar 2022
Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability
15.4(3)m4.1 - CVE-2018-0167Exploited list, 3 Mar 2022
Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability
4.1 to before 5.1.3 - CVE-2020-3118Exploited list, 3 Nov 2021
Cisco IOS XR Software Discovery Protocol Format String Vulnerability
5.2.56.4.26.5.36.6.0 to before 6.6.126.6.257.0.0 to before 7.0.2 - CVE-2020-3566Exploited list, 3 Nov 2021
Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability
6.4.2 - CVE-2020-3569Exploited list, 3 Nov 2021
Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability
before 6.5.26.5.36.6.26.6.37.0.27.1.27.1.15
1 more exploited flaw names IOS XR without a version of its own, for example as the system other affected software runs on. It is in the list below.
Which IOS XR vulnerabilities are being exploited?
10 flaws are on the government list of vulnerabilities known to be exploited. These are the ones criminals are using now, so they go first, whatever their severity score says.
- 7.5HTTP/2 Rapid Reset Attack Vulnerability
HTTP/2 contains a rapid reset vulnerability that allows for a distributed denial-of-service attack (DDoS).
- 7.5Cisco IOS, IOS XR, and IOS XE IKEv1 Information Disclosure Vulnerability
Cisco IOS, IOS XR, and IOS XE contain insufficient condition checks in the part of the code that handles Internet Key Exchange version 1 (IKEv1) security negotiation requests.
- 6.5Cisco IOS XR Open Port Vulnerability
Cisco IOS XR software health check opens TCP port 6379 by default on activation.
- 5.9Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability
Cisco IOS XR,when BGP is the configured routing feature, allows remote attackers to cause a denial-of-service (DoS).
- 7.5Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability
Cisco IOS XR, when BGP is the configured routing feature, allows remote attackers to cause a denial-of-service (DoS).
- 8.0Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability
Format string vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a...
- 8.8Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability
There is a buffer overflow vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software which could allow an unauthenticated, adjacent...
- 8.8Cisco IOS XR Software Discovery Protocol Format String Vulnerability
Cisco IOS XR improperly validates string input from certain fields in Cisco Discovery Protocol messages.
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. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- >99%
The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.
- 88%
The server IKEv1 implementation in Cisco IOS 12.2 through 12.4 and 15.0 through 15.6, IOS XE through 3.18S, IOS XR 4.3.x and 5.0.x through 5.2.x, and PIX before 7.0 allows remote attackers to obtain sensitive...
- 13%CVE-2007-4430Medium
Unspecified vulnerability in Cisco IOS 12.0 through 12.4 allows context-dependent attackers to cause a denial of service (device restart and BGP routing table rebuild) via certain regular expressions in a "show ip...
- 12%
A vulnerability in the Cisco Discovery Protocol implementation for Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a reload on an affected device.
- 11%
A vulnerability in the health check RPM of Cisco IOS XR Software could allow an unauthenticated, remote attacker to access the Redis instance that is running within the NOSi container.
- 6.3%CVE-2019-1681High
A vulnerability in the TFTP service of Cisco Network Convergence System 1000 Series software could allow an unauthenticated, remote attacker to retrieve arbitrary files from the targeted device, possibly resulting in...
- 5.7%
Cisco IOS XR 3.4.0 through 3.9.1, when BGP is enabled, does not properly handle unrecognized transitive attributes, which allows remote attackers to cause a denial of service (peering reset) via a crafted prefix...
- 4.0%CVE-2009-0629Medium
The (1) Airline Product Set (aka ALPS), (2) Serial Tunnel Code (aka STUN), (3) Block Serial Tunnel Code (aka BSTUN), (4) Native Client Interface Architecture (NCIA) support, (5) Data-link switching (aka DLSw), (6)...
- 4.0%CVE-2018-0418High
A vulnerability in the Local Packet Transport Services (LPTS) feature set of Cisco ASR 9000 Series Aggregation Services Router Software could allow an unauthenticated, remote attacker to cause a denial of service...
Running IOS XR? We'll keep checking.
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1 flaw being exploited affects software Acme tracks
HTTP/2 contains a rapid reset vulnerability that allows for a distributed denial-of-service attack (DDoS).
- Matched to
- IOS XR on Acme's software list
- What to do
- Patch first, then check for signs of use
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
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.
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.
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.
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.
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.