TI-2026-69207 Aliases CVE-2026-20173 GHSA-8g9j-7mq6-rw6g

Resource exhaustion in Cisco NX-OS Software causes denial of service

LOW 32CWE-770Published 2026-10-07 · Updated 2026-10-07

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

Cisco NX-OS Software lists many releases as affected, including 7.3(0)DX(1). Rate limiting is improperly applied to some protocols, which allows excess traffic to exhaust resources (CWE-770). An unauthenticated remote attacker can send a high rate of UDP or TCP connections to a data plane interface, causing packet loss and temporary instability in routing and control plane protocols. The denial of service condition clears without manual intervention after the traffic stops.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

A vulnerability in Cisco NX-OS Software could allow an unauthenticated, remote attacker to exhaust system resources, causing a denial of service (DoS) condition. This vulnerability exists because rate limiting was improperly applied to some protocols. An attacker could exploit this vulnerability by sending a high rate of UDP or TCP connections to a data plane interface on an affected device. A successful exploit could allow the attacker to cause instability to various routing and control plane protocols through some packet loss and temporary disruptions, causing a DoS condition. This DoS condition will clear without manual intervention soon after the high rate of traffic is stopped.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00373 31st 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 NX-OS Software	8.2(5); 7.3(5)D1(1); 8.4(2); 8.4(3); 9.2(3); 9.2(2v); 7.3(4)D1(1); 8.2(1); 9.2(1); 9.2(2t); 9.2(3y); 9.3(2); 8.1(1); 8.2(2); 8.3(2); 7.3(2)D1(3a); 9.2(4); 8.1(2); 7.3(3)D1(1); 8.2(3); 8.4(1); 7.3(0)DX(1); 7.3(2)D1(1); 9.3(1); 7.3(2)D1(2); 8.2(4); 9.3(1z); 9.2(2); 8.1(2a); 7.3(2)D1(3); 8.3(1); 7.3(1)D1(1); 7.3(0)D1(1); 9.3(3); 7.3(2)D1(1d); 9.3(4); 7.3(6)D1(1); 8.2(6); 9.3(5); 9.3(6); 8.4(4); 7.3(7)D1(1); 9.3(5w); 8.2(7); 9.3(7); 9.3(7k); 7.3(8)D1(1); 9.3(7a); 8.2(7a); 9.3(8); 8.4(4a); 8.4(5); 8.2(8); 9.3(9); 7.3(9)D1(1); 8.4(6); 9.3(10); 8.2(9); 10.3(1); 8.4(7); 10.3(2); 8.4(6a); 9.3(11); 10.3(3); 8.2(10); 9.3(12); 10.4(1); 8.4(8); 10.3(99w); 10.3(3w); 10.3(99x); 10.3(3o); 8.4(9); 10.3(4); 10.3(3p); 10.3(4a); 10.4(2); 10.3(3q); 9.3(13); 8.2(11); 10.3(5); 10.4(3); 10.3(3x); 10.3(4g); 10.5(1); 8.4(10); 10.3(3r); 10.3(6); 9.3(14); 10.4(4); 10.3(4h); 10.5(2); 8.4(11); 10.3(7); 10.4(5); 10.5(3); 9.3(15); 10.4(4g); 10.5(4); 8.4(12); 10.5(3t); 10.3(8); 10.4(6); 10.5(3s); 10.5(3e); 10.5(3o); 9.3(16); 10.5(3p); 10.4(7); 10.5(5); 9.3(17)	—	No fix listed	CNA

Cisco NX-OS Software VendorCisco Affected 8.2(5); 7.3(5)D1(1); 8.4(2); 8.4(3); 9.2(3); 9.2(2v); 7.3(4)D1(1); 8.2(1); 9.2(1); 9.2(2t); 9.2(3y); 9.3(2); 8.1(1); 8.2(2); 8.3(2); 7.3(2)D1(3a); 9.2(4); 8.1(2); 7.3(3)D1(1); 8.2(3); 8.4(1); 7.3(0)DX(1); 7.3(2)D1(1); 9.3(1); 7.3(2)D1(2); 8.2(4); 9.3(1z); 9.2(2); 8.1(2a); 7.3(2)D1(3); 8.3(1); 7.3(1)D1(1); 7.3(0)D1(1); 9.3(3); 7.3(2)D1(1d); 9.3(4); 7.3(6)D1(1); 8.2(6); 9.3(5); 9.3(6); 8.4(4); 7.3(7)D1(1); 9.3(5w); 8.2(7); 9.3(7); 9.3(7k); 7.3(8)D1(1); 9.3(7a); 8.2(7a); 9.3(8); 8.4(4a); 8.4(5); 8.2(8); 9.3(9); 7.3(9)D1(1); 8.4(6); 9.3(10); 8.2(9); 10.3(1); 8.4(7); 10.3(2); 8.4(6a); 9.3(11); 10.3(3); 8.2(10); 9.3(12); 10.4(1); 8.4(8); 10.3(99w); 10.3(3w); 10.3(99x); 10.3(3o); 8.4(9); 10.3(4); 10.3(3p); 10.3(4a); 10.4(2); 10.3(3q); 9.3(13); 8.2(11); 10.3(5); 10.4(3); 10.3(3x); 10.3(4g); 10.5(1); 8.4(10); 10.3(3r); 10.3(6); 9.3(14); 10.4(4); 10.3(4h); 10.5(2); 8.4(11); 10.3(7); 10.4(5); 10.5(3); 9.3(15); 10.4(4g); 10.5(4); 8.4(12); 10.5(3t); 10.3(8); 10.4(6); 10.5(3s); 10.5(3e); 10.5(3o); 9.3(16); 10.5(3p); 10.4(7); 10.5(5); 9.3(17) Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:nx-os::::::::	—	—	Cisco

cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* Versions — — ·Cisco

Remediation

The sources list no fixed version for Cisco NX-OS Software.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

2026-10-07 Threatist record created from CVE-2026-20173
2026-10-07 CISA SSVC decision points changed
2026-10-07 Priority changed: MEDIUM → LOW
2026-10-07 Alias added: GHSA-8g9j-7mq6-rw6g

References

Other 1

cisco-sa-nxos-nscpdos-SnderkC7

TI-2026-74174 Arbitrary file write in Cisco Secure Email Gateway via AMP feature KEVCVSS 3.1CRITICAL 9.8
TI-2026-53490 Cisco Catalyst SD-WAN Manager System Account Authorization Bypass Vulnerability KEVCVSS 3.1CRITICAL 9.8
TI-2026-53489 Cisco Secure Email Gateway SQL Injection Vulnerability KEVCVSS 3.1CRITICAL 9.8
TI-2026-53488 Cisco Identity Services Engine Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
TI-2026-16388 Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
TI-2026-16344 Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 10.0

See all 7059 →

Sources

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