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Fencer Vulns
medium 5.8

CVE-2023-20176 json

A vulnerability in the networking component of Cisco access point (AP) software could allow an unauthenticated, remote attacker to cause a…

published 2023-09-27 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-24355

cvss
5.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 58%
public exploits
0
none known

Summary

A vulnerability in the networking component of Cisco access point (AP) software could allow an unauthenticated, remote attacker to cause a temporary disruption of service. This vulnerability is due to overuse of AP resources. An attacker could exploit this vulnerability by connecting to an AP on an affected device as a wireless client and sending a high rate of traffic over an extended period of time. A successful exploit could allow the attacker to cause the Datagram TLS (DTLS) session to tear down and reset, causing a denial of service (DoS) condition.

Patch / fix

  • cisco catalyst_9166_firmware 17.6.6
  • cisco catalyst_9164_firmware 17.6.6
  • cisco catalyst_9136_firmware 17.6.6
  • cisco catalyst_9130_firmware 17.6.6
  • cisco catalyst_9124_firmware 17.6.6

Exploit prediction

0.87% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
NVD 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Affected products

  • Cisco Cisco Aironet Access Point Software
  • Cisco Cisco Aironet Access Point Software (IOS XE Controller)

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.