TI-2021-01344 Aliases CVE-2021-1622 GHSA-6767-7pjf-mxgf

Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers Common Open Policy…

MEDIUM 45CWE-833Published 2021-09-23 · Updated 2024-11-07

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-667 and the CVSS impact.

Summary

A vulnerability in the Common Open Policy Service (COPS) of Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, remote attacker to cause resource exhaustion, resulting in a denial of service (DoS) condition. This vulnerability is due to a deadlock condition in the code when processing COPS packets under certain conditions. An attacker could exploit this vulnerability by sending COPS packets with high burst rates to an affected device. A successful exploit could allow the attacker to cause the CPU to consume excessive resources, which prevents other control plane processes from obtaining resources and results in a DoS.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00978 62nd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco IOS XE Software	all versions	—	No fix listed	CNA

Cisco IOS XE Software VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 14

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:ios_xe::::::::	before 16.12.1z1	Vulnerable	Cisco
cpe:2.3:o:cisco:ios_xe:17.3.1x:::::::*	17.3.1x	Vulnerable	Cisco
cpe:2.3:h:cisco:7600_router:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_901-12c-f-d:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_901-12c-ft-d:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_901-4c-f-d:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_901-4c-ft-d:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_901-6cz-f-a:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_901-6cz-f-d:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_901-6cz-fs-a:-:::::::*	not specified by NVD	Running on	Cisco

cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* Versions before 16.12.1z1 Vulnerable ·Cisco
cpe:2.3:o:cisco:ios_xe:17.3.1x:*:*:*:*:*:*:* Versions 17.3.1x Vulnerable ·Cisco
cpe:2.3:h:cisco:7600_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_901-12c-f-d:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_901-12c-ft-d:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_901-4c-f-d:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_901-4c-ft-d:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_901-6cz-f-a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_901-6cz-f-d:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_901-6cz-fs-a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Show 4 more CPE

CPE	Versions	Role	Vendor
cpe:2.3:h:cisco:asr_901-6cz-fs-d:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_901-6cz-ft-a:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_901-6cz-ft-d:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:cbr-8:-:::::::*	not specified by NVD	Running on	Cisco

cpe:2.3:h:cisco:asr_901-6cz-fs-d:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_901-6cz-ft-a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_901-6cz-ft-d:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:cbr-8:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-1622
2026-10-03 Alias added: GHSA-6767-7pjf-mxgf

References

Patch 1

20210922 Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers Common Open Policy Service Denial of Service Vulnerability

TI-2023-06904 Cisco is providing an update for the ongoing investigation into observed exploitation of… KEVCVSS 3.1CRITICAL 10.0
TI-2018-00122 Memory corruption in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
TI-2017-02977 Improper input validation in Cisco IOS and IOS XE Software KEVCVSS 3.1CRITICAL 9.8
TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
TI-2017-04498 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
TI-2017-04497 Memory corruption in Cisco IOS XE Software KEVCVSS 3.1HIGH 8.8

See all 561 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences