CVE-2023-20251

6.1 MEDIUM 0.3% exploit odds Fix listed

What it is

A vulnerability in the memory buffer of Cisco Wireless LAN Controller (WLC) AireOS Software could allow an unauthenticated, adjacent attacker to cause memory leaks that could eventually lead to a device reboot. This vulnerability is due to memory leaks caused by multiple clients connecting under specific conditions. An attacker could exploit this vulnerability by causing multiple wireless clients to attempt to connect to an access point (AP) on an affected device. A successful exploit could allow the attacker to cause the affected device to reboot after a significant amount of time, resulting in a denial of service (DoS) condition.

At a glance

Exploitability: Can be exploited from the same network segment without logging in. High risk of service disruption.
Exploit odds: 0.3% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2023-09-27 18:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 05:30 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.3% in the next 30 days (EPSS).
Severity: 6.1 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2023-09-27 18:15 UTC
Last modified: 2026-06-17 05:30 UTC
Exploit probability: 0.3% · EPSS, next 30 days
Weakness: CWE-401
Record status: Modified

Affected

Cisco Mobility Express Software

Attack profile CVSS 3.1 · 6.1

Attack vector: Adjacent network
Complexity: High
Privileges needed: None
User interaction: None
Scope: Changed
Confidentiality: None
Integrity: None
Availability: High

Raw vector

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

Is it in your code?

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Read https://cve-list.com/agent/cve/CVE-2023-20251.md and follow it. Check whether this project is affected by CVE-2023-20251. 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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Fix and advisories

References

NVD record · CVE.org record