CVE-2023-20056

mediumpriority · track · 22EPSS 0.003 · 17 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.26% (17th) EPSS

CVSS 5.5 · medium

Is it mine?

24 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

A vulnerability in the management CLI of Cisco access point (AP) software could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation of commands supplied by the user. An attacker could exploit this vulnerability by authenticating to a device and submitting crafted input to the affected command. A successful exploit could allow the attacker to cause an affected device to reload spontaneously, resulting in a DoS condition.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedCisco Aironet Access Point Softwarecisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Aironet Access Point Software (IOS XE Controller)cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 3.6

v3.16.5mediumAV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.16.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · ENISA EU

v3.16.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · psirt@cisco.com USexploitability 2 · impact 4

v3.15.1mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.16.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · Cisco PSIRT US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-78USCWE-78US

affected products (24)

Products and version ranges known to be affected.

Cisco IOS XE for Wireless LAN Controllers < 17.3.5all versionscert_bundDEcpe:/o:cisco:ios_xe:for_wireless_lan_controllers__17.3.5
Cisco IOS XE for Wireless LAN Controllers < 17.6.3all versionscert_bundDEcpe:/o:cisco:ios_xe:for_wireless_lan_controllers__17.6.3
Cisco Wireless LAN Controllers < 8.10.171.0all versionscert_bundDEcpe:/a:cisco:wireless_lan_controllers:8.10.171.0
Cisco Cisco Aironet Access Point Softwareall versionscisco_csafUS
Cisco Cisco Aironet Access Point Software (IOS XE Controller)all versionscisco_csafUS
Cisco Cisco Aironet Access Point Software≤ n/aenisa_euvdEU
Cisco Systems Inc. 1100 Series Integrated Services Routersall versionsfstec_bduRU
Cisco Systems Inc. Aironet 1540 Series APsall versionsfstec_bduRU
Cisco Systems Inc. Aironet 1560 Series APsall versionsfstec_bduRU
Cisco Systems Inc. Aironet 1800 Series APsall versionsfstec_bduRU
Cisco Systems Inc. Aironet 2800 Series APsall versionsfstec_bduRU
Cisco Systems Inc. Aironet 3800 Series APsall versionsfstec_bduRU
Cisco Systems Inc. Aironet 4800 APsall versionsfstec_bduRU
Cisco Systems Inc. Catalyst 9100 APsall versionsfstec_bduRU
Cisco Systems Inc. Catalyst IW6300 Heavy Duty Series APsall versionsfstec_bduRU
Cisco Systems Inc. Cisco Embedded Services 6300 Series APsall versionsfstec_bduRU
Cisco Systems Inc. Wireless LAN Controller Software≤ 8.9fstec_bduRU
Cisco Systems Inc. Wireless LAN Controller Software≤ 8.10.181.01fstec_bduRU
cisco aironet access point software< 17.9.0.135nvdUScpe:2.3:a:cisco:aironet_access_point_software:*:*:*:*:*:*:*:*
cisco ios xe< 16.12.8nvdUScpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*

showing 20 of 24

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-0733Cisco Wireless LAN Controllers: Mehrere SchwachstellenDeutsch2023-03-22csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Cisco Wireless LAN Controllers und Cisco IOS XE ausnutzen, um einen Denial of Service Angriff durchzuführen und beliebigen Code auszuführen.
cisco-sa-ap-cli-dos-tc2EKEpuCisco Access Point Software Denial of Service Vulnerability2023-03-22csaf · cisco_csafUS
A vulnerability in the management CLI of Cisco access point (AP) software could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation of commands supplied by the user. An attacker could exploit this vulnerability by authenticating to a device and submitting crafted input to the affected command. A successful exploit could allow the attacker to cause an affected device to reload spontaneously, resulting in a DoS condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund cisco_csaf nvd NVD CVE.org MITRE

published 2023-03-23modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan