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CRS-1 24-slot Fabric Chassis [Chassis Only]

SKU CRS-FCC

Cisco Chassis · carrier routing system Series

Official Cisco notice (EOL13773) ↗ Retrieved 2026-09-27

CRS-1 24-slot Fabric Chassis [Chassis Only] is dead. Cisco support ended 2026-08-31 (-35d). Last available for order 2021-08-06.

This is a specific ordering configuration. The carrier routing system platform may continue to be available under current SKUs. See related components below.

Is the CRS-1 24-slot Fabric Chassis [Chassis Only] still supported?

No. Cisco ended support for the CRS-1 24-slot Fabric Chassis [Chassis Only] on 2026-08-31. No further security fixes will be issued. See Cisco's lifecycle bulletin.

When does the CRS-1 24-slot Fabric Chassis [Chassis Only] reach end of support?

Cisco support for the CRS-1 24-slot Fabric Chassis [Chassis Only] ends on 2026-08-31.

What replaces the CRS-1 24-slot Fabric Chassis [Chassis Only]?

Cisco has not published a successor model for the CRS-1 24-slot Fabric Chassis [Chassis Only].

What known-exploited CVEs apply to the CRS-1 24-slot Fabric Chassis [Chassis Only] past end of support?

9 CVEs in CISA's Known Exploited Vulnerabilities catalog apply to the platform the CRS-1 24-slot Fabric Chassis [Chassis Only] runs. These will not be patched on this device because it is past the Cisco security-support date. 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
`CVE-2016-6415`	2023-05-19	Cisco IOS, IOS XR, and IOS XE IKEv1 Information Disclosure Vulnerability Advisory 1 Advisory 2
`CVE-2022-20821`	2022-05-23	Cisco IOS XR Open Port Vulnerability Advisory 1
`CVE-2010-3035`	2022-03-25	Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability Advisory 1
`CVE-2009-2055`	2022-03-25	Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability Advisory 1
`CVE-2018-0175`	2022-03-03	Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability Advisory 1
`CVE-2018-0167`	2022-03-03	Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability Advisory 1
`CVE-2020-3118`	2021-11-03	Cisco IOS XR Software Discovery Protocol Format String Vulnerability Advisory 1
`CVE-2020-3566`	2021-11-03	Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability Advisory 1
`CVE-2020-3569`	2021-11-03	Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability Advisory 1

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.

Announced 2021-02-05

End of Sale 2021-08-06

End of Support 2026-08-31