TI-2020-15922 Aliases CVE-2020-26070 GHSA-wg72-p7jc-jqrx

Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers Slow Path…

MEDIUM 47CWE-404Published 2020-11-12 · Updated 2024-11-13

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-404.

Summary

A vulnerability in the ingress packet processing function of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper resource allocation when an affected device processes network traffic in software switching mode (punted). An attacker could exploit this vulnerability by sending specific streams of Layer 2 or Layer 3 protocol data units (PDUs) to an affected device. A successful exploit could cause the affected device to run out of buffer resources, which could make the device unable to process or forward traffic, resulting in a DoS condition. The device would need to be restarted to regain functionality.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01901 79th 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 XR Software	all versions	—	No fix listed	CNA

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

CPE configurations NVD · 12

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:ios_xr::::::::	before 6.7.2; 7.1.0 to before 7.1.2	Vulnerable	Cisco
cpe:2.3:h:cisco:asr_9000v:v2:::::::*	v2	Running on	Cisco
cpe:2.3:h:cisco:asr_9001:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_9006:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_9010:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_9901:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_9903:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_9904:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_9906:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_9910:-:::::::*	not specified by NVD	Running on	Cisco

cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* Versions before 6.7.2; 7.1.0 to before 7.1.2 Vulnerable ·Cisco
cpe:2.3:h:cisco:asr_9000v:v2:*:*:*:*:*:*:* Versions v2 Running on ·Cisco
cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_9006:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_9010:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_9901:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_9903:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_9904:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_9906:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_9910:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Show 2 more CPE

CPE	Versions	Role	Vendor
cpe:2.3:h:cisco:asr_9912:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_9922:-:::::::*	not specified by NVD	Running on	Cisco

cpe:2.3:h:cisco:asr_9912:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_9922:-:*:*:*:*:*:*:* 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-2020-26070
2026-10-03 Alias added: GHSA-wg72-p7jc-jqrx

References

Advisory 1

20201110 Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers Slow Path Forwarding Denial of Service Vulnerability

TI-2020-02680 Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability KEVCVSS 3.1HIGH 8.8
TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
TI-2020-03113 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerabilities KEVCVSS 3.1HIGH 8.6
TI-2020-03110 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability KEVCVSS 3.1HIGH 8.6
TI-2018-00142 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.0
TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5

See all 199 →

Sources

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