IOS-XR 3.5
IOS-XR-3.5
Os Release
· Cisco IOS XR software Series
Is IOS-XR 3.5 still maintained?
No. Cisco no longer maintains IOS-XR 3.5; support ended 2014-05-11. It receives no fixes of any kind, including security patches. Devices running it are unpatched against any newer vulnerability — plan an upgrade to a maintained release. See Cisco's lifecycle bulletin.
When do security fixes for IOS-XR 3.5 stop?
Cisco has not published an end-of-engineering date for IOS-XR 3.5.
What should I upgrade IOS-XR 3.5 to?
Upgrade to a currently maintained Cisco release. Check the release-train table on the vendor page for the nearest supported version.
What known-exploited CVEs apply to the IOS-XR 3.5 past end of support?
9 CVEs in CISA's Known Exploited Vulnerabilities catalog affect Cisco IOS-XR. Because IOS-XR 3.5 is past end of engineering, it will not receive fixes for them — a device left on this release is exploitable with no patch available. Upgrade to a maintained release. See the Known Exploited Vulnerabilities table below for the full list.
Known Exploited Vulnerabilities
This device is past Cisco's security-support date. 9 CVEs in CISA's Known Exploited Vulnerabilities catalog apply to the platform it runs. Cisco is not issuing patches for this model. Isolate, compensate, or refresh.
| CVE | KEV added | Vulnerability | Flags |
|---|---|---|---|
CVE-2016-6415
|
Cisco IOS, IOS XR, and IOS XE IKEv1 Information Disclosure Vulnerability | ||
CVE-2022-20821
|
Cisco IOS XR Open Port Vulnerability | ||
CVE-2010-3035
|
Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability | ||
CVE-2009-2055
|
Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability | ||
CVE-2018-0175
|
Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability | ||
CVE-2018-0167
|
Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability | ||
CVE-2020-3118
|
Cisco IOS XR Software Discovery Protocol Format String Vulnerability | ||
CVE-2020-3566
|
Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability | ||
CVE-2020-3569
|
Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability |
Source: CISA Known Exploited Vulnerabilities catalog. The Ransomware flag reflects CISA's own knownRansomwareCampaignUse field, set when the CVE has been observed in ransomware campaigns per their threat intel. It's not a property of the vulnerability description itself.
Correlation is at the platform level, not per-OS-version. Not exhaustive: KEV only lists actively-exploited CVEs and many relevant unexploited vulnerabilities are not here. Verify against vendor security advisories (PSIRT, JSA, PAN-SA) and NVD before acting. See compensating controls if refresh isn't immediate.
IOS-XR 3.5 Release Lifecycle
IOS-XR 3.5 is a Cisco Cisco IOS XR software software release. Releases are maintained on a fixed schedule: Cisco ships fixes and security patches until the release reaches end of engineering, after which a device must be upgraded to a maintained release to stay patchable. The dates below are milestones for the software train, not for any specific appliance — hardware running this release has its own separate lifecycle. This product has reached end of life as of , meaning Cisco no longer provides technical support, software updates, or hardware replacement for this product. Organizations still running the IOS-XR 3.5 should plan a migration .
Lifecycle Milestones
| Lifecycle notice published | 18y 2mo ago | |
|---|---|---|
| Last order date | 17y 2mo ago | |
| End of software maintenance | 16y 5mo ago | |
| Last date of support | 12y 5mo ago |