CVE-2023-20067

Wireless association interruption via malformed profiling traffic

Published Mar 23, 2023 · Updated Oct 25, 2024

Improper input validation in Cisco IOS XE Software for WLCs allows physically proximate attackers to interrupt new client associations. The HTTP-based client profiling feature fails to validate crafted traffic received through a wireless access point, allowing processing load to drive CPU utilization upward. HTTP-based client profiling must be enabled, a non-default state; service returns when the offending traffic stops, with no reported data impact.

CVSS severity7.4
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Cisco IOS XE Software for WLCs allows physically proximate attackers to interrupt new client associations. The HTTP-based client profiling feature fails to validate crafted traffic received through a wireless access point, allowing processing load to drive CPU utilization upward. HTTP-based client profiling must be enabled, a non-default state; service returns when the offending traffic stops, with no reported data impact.

The record

CVE
CVE-2023-20067
Published
Mar 23, 2023
Updated
Oct 25, 2024
Vendor
ClamAV
Product
Cisco IOS XE Software
Classifications
CWE-770, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco IOS XE Softwareversion=n/a

Published CVSS scores

7.4CiscoCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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