CVE-2022-20823

What it is

A vulnerability in the OSPF version 3 (OSPFv3) feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to incomplete input validation of specific OSPFv3 packets. An attacker could exploit this vulnerability by sending a malicious OSPFv3 link-state advertisement (LSA) to an affected device. A successful exploit could allow the attacker to cause the OSPFv3 process to crash and restart multiple times, causing the affected device to reload and resulting in a DoS condition. Note: The OSPFv3 feature is disabled by default. To exploit this vulnerability, an attacker must be able to establish a full OSPFv3 neighbor state with an affected device. For more information about exploitation conditions, see the Details section of this advisory.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

1.1% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2022-08-25 19:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 04:25 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.1% in the next 30 days (EPSS).
• Severity: 8.6 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2022-08-25 19:15 UTC

Last modified

2026-06-17 04:25 UTC

Exploit probability

1.1% · EPSS, next 30 days

Weakness

CWE-126

Record status

Modified

Affected

• Cisco Nexus 3016 Firmware
• Cisco Nexus 3016q Firmware
• Cisco Nexus 3048 Firmware
• Cisco Nexus 3064 Firmware
• Cisco Nexus 3064-32t Firmware
• Cisco Nexus 3064-t Firmware
• Cisco Nexus 3064-x Firmware
• Cisco Nexus 3064t Firmware

Attack profile CVSS 3.1 · 8.6

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2022-20823.md and follow it. Check whether this project is affected by CVE-2022-20823. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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