CVE-2019-1826

mediumpriority · track · 23EPSS 0.006 · 46 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.56% (46th) EPSS

CVSS 5.5 · medium

Is it mine?

8 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisco_csaf

EPSS · scored 2026-10-27

A vulnerability in the quality of service (QoS) feature of Cisco Aironet Series Access Points (APs) could allow an authenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper input validation on QoS fields within Wi-Fi frames by the affected device. An attacker could exploit this vulnerability by sending malformed Wi-Fi frames to an affected device. A successful exploit could allow the attacker to cause the affected device to crash, 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

cvss

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

6.8

010

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

v2.05.5mediumAV:A/AC:L/Au:S/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 5.1 · impact 6.9

v3.05.7mediumCVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.1 · impact 3.6

v3.06.8mediumCVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · ENISA EU

v3.06.8mediumCVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · Cisco PSIRT US

v3.06.8mediumCVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · psirt@cisco.com USexploitability 2.3 · impact 4

v3.05.2mediumCVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.16.8mediumAV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

ssvc

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

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-404US

affected products (8)

Products and version ranges known to be affected.

Cisco Cisco Aironet Access Point Softwareall versionscisco_csafUS
Cisco Cisco Aironet Access Point Software≤ 8.5enisa_euvdEU
Cisco Systems Inc. Cisco Aironet 1560≤ 8.5(131.3)fstec_bduRU
Cisco Systems Inc. Cisco Aironet 2800≤ 8.5(131.3)fstec_bduRU
Cisco Systems Inc. Cisco Aironet 3800≤ 8.5(131.3)fstec_bduRU
Cisco Systems Inc. Cisco Aironet 4800≤ 8.5(131.3)fstec_bduRU
cisco aironet access point firmwareall versionsnvdUScpe:2.3:o:cisco:aironet_access_point_firmware:*:*:*:*:*:*:*:*
cisco aironet access point firmware= 8.5(131.3)nvdUScpe:2.3:o:cisco:aironet_access_point_firmware:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

cisco-sa-20190417-aap-dosCisco Aironet Series Access Points Quality of Service Denial of Service Vulnerability2019-04-17csaf · cisco_csafUS
A vulnerability in the quality of service (QoS) feature of Cisco Aironet Series Access Points (APs) could allow an authenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper input validation on QoS fields within Wi-Fi frames by the affected device. An attacker could exploit this vulnerability by sending malformed Wi-Fi frames to an affected device. A successful exploit could allow the attacker to cause the affected device to crash, resulting in a DoS condition. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190417-aap-dos ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190417-aap-dos"]

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisco_csaf nvd NVD CVE.org MITRE

published 2019-04-18modified 2026-06-17

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+25188 more

references (15)

External citations — patches, advisories, analysis.

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