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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Cisco Cisco NX-OS Software unknown
Version Status Constraints
8.2(5) affected —
7.3(5)D1(1) affected —
8.4(2) affected —
8.4(3) affected —
9.2(3) affected —
9.2(2v) affected —
7.3(4)D1(1) affected —
8.2(1) affected —
9.2(1) affected —
9.2(2t) affected —
9.2(3y) affected —
9.3(2) affected —
8.1(1) affected —
8.2(2) affected —
8.3(2) affected —
7.3(2)D1(3a) affected —
9.2(4) affected —
8.1(2) affected —
7.3(3)D1(1) affected —
8.2(3) affected —
8.4(1) affected —
7.3(0)DX(1) affected —
7.3(2)D1(1) affected —
9.3(1) affected —
7.3(2)D1(2) affected —
8.2(4) affected —
9.3(1z) affected —
9.2(2) affected —
8.1(2a) affected —
7.3(2)D1(3) affected —
8.3(1) affected —
7.3(1)D1(1) affected —
7.3(0)D1(1) affected —
9.3(3) affected —
7.3(2)D1(1d) affected —
9.3(4) affected —
7.3(6)D1(1) affected —
8.2(6) affected —
9.3(5) affected —
9.3(6) affected —
8.4(4) affected —
7.3(7)D1(1) affected —
9.3(5w) affected —
8.2(7) affected —
9.3(7) affected —
9.3(7k) affected —
7.3(8)D1(1) affected —
9.3(7a) affected —
8.2(7a) affected —
9.3(8) affected —
8.4(4a) affected —
8.4(5) affected —
8.2(8) affected —
9.3(9) affected —
7.3(9)D1(1) affected —
8.4(6) affected —
9.3(10) affected —
8.2(9) affected —
10.3(1) affected —
8.4(7) affected —
10.3(2) affected —
8.4(6a) affected —
9.3(11) affected —
10.3(3) affected —
8.2(10) affected —
9.3(12) affected —
10.4(1) affected —
8.4(8) affected —
10.3(99w) affected —
10.3(3w) affected —
10.3(99x) affected —
10.3(3o) affected —
8.4(9) affected —
10.3(4) affected —
10.3(3p) affected —
10.3(4a) affected —
10.4(2) affected —
10.3(3q) affected —
9.3(13) affected —
8.2(11) affected —
10.3(5) affected —
10.4(3) affected —
10.3(3x) affected —
10.3(4g) affected —
10.5(1) affected —
8.4(10) affected —
10.3(3r) affected —
10.3(6) affected —
9.3(14) affected —
10.4(4) affected —
10.3(4h) affected —
10.5(2) affected —
8.4(11) affected —
10.3(7) affected —
10.4(5) affected —
10.5(3) affected —
9.3(15) affected —
10.4(4g) affected —
10.5(4) affected —
8.4(12) affected —
10.5(3t) affected —
10.3(8) affected —
10.4(6) affected —
10.5(3s) affected —
10.5(3e) affected —
10.5(3o) affected —
9.3(16) affected —
10.5(3p) affected —
10.4(7) affected —
10.5(5) affected —
9.3(17) affected —

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
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Project Subscriptions

Vendors Products
Cisco Subscribe
Nx-os Software Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-nscpdos-SnderkC7 cve-icon cve-icon
History

Wed, 07 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 07 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
First Time appeared Cisco
Cisco nx-os Software
Vendors & Products Cisco
Cisco nx-os Software

Wed, 07 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Cisco NX-OS Software Denial of Service Vulnerability
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 5.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-10-07T17:42:39.672Z

Reserved: 2025-10-08T11:59:15.392Z

Link: CVE-2026-20173

cve-icon Vulnrichment

Updated: 2026-10-07T17:42:31.052Z

cve-icon NVD

Status : Received

Published: 2026-10-07T17:16:54.843

Modified: 2026-10-07T18:17:19.937

Link: CVE-2026-20173

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-07T18:30:14Z

Weaknesses