CVE-2019-1920

mediumpriority · track · 30EPSS 0.008 · 56 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.80% (56th) EPSS

CVSS 6.1 · medium

Is it mine?

19 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 802.11r Fast Transition (FT) implementation for Cisco IOS Access Points (APs) Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected interface. The vulnerability is due to a lack of complete error handling condition for client authentication requests sent to a targeted interface configured for FT. An attacker could exploit this vulnerability by sending crafted authentication request traffic to the targeted interface, causing the device to restart unexpectedly.

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.

7.4

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.1–7.4

v2.06.1mediumAV:A/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 6.5 · impact 6.9

v3.17.4highCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 4

v3.07.4highCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · ENISA EU

v3.07.4highCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · psirt@cisco.com USexploitability 2.8 · impact 4

v3.07.4highCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · Cisco PSIRT US

v3.17.4highAV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.16.8mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

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

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USCWE-20US

affected products (19)

Products and version ranges known to be affected.

Cisco Cisco Aironet Access Point Softwareall versionscisco_csafUS
Cisco Cisco Aironet Access Point Softwareunspecified → 8.8.100.0enisa_euvdEU
Cisco Systems Inc. Cisco IOS8.0 → 8.2.170.0fstec_bduRU
Cisco Systems Inc. Cisco IOS8.1 → 8.2.170.0fstec_bduRU
Cisco Systems Inc. Cisco IOS8.2 → 8.2.170.0fstec_bduRU
Cisco Systems Inc. Cisco IOS8.3 → 8.3.150.0fstec_bduRU
Cisco Systems Inc. Cisco IOS8.4 → 8.5.131.0fstec_bduRU
Cisco Systems Inc. Cisco IOS8.5 → 8.5.131.0fstec_bduRU
Cisco Systems Inc. Cisco IOS8.6 → 8.8.100.0fstec_bduRU
cisco access points< 8.2.170.0nvdUScpe:2.3:o:cisco:access_points:*:*:*:*:*:*:*:*
cisco access points8.3 → 8.3.150.0nvdUScpe:2.3:o:cisco:access_points:*:*:*:*:*:*:*:*
cisco access points8.4 → 8.5.131.0nvdUScpe:2.3:o:cisco:access_points:*:*:*:*:*:*:*:*
cisco access points8.6 → 8.8.100.0nvdUScpe:2.3:o:cisco:access_points:*:*:*:*:*:*:*:*
cisco aironet 3700e firmware= 15.3(3)jc14nvdUScpe:2.3:o:cisco:aironet_3700e_firmware:*:*:*:*:*:*:*:*
cisco aironet 3700e firmware= 15.3(3)jd6nvdUScpe:2.3:o:cisco:aironet_3700e_firmware:*:*:*:*:*:*:*:*
cisco aironet 3700i firmware= 15.3(3)jc14nvdUScpe:2.3:o:cisco:aironet_3700i_firmware:*:*:*:*:*:*:*:*
cisco aironet 3700i firmware= 15.3(3)jd6nvdUScpe:2.3:o:cisco:aironet_3700i_firmware:*:*:*:*:*:*:*:*
cisco aironet 3700p firmware= 15.3(3)jc14nvdUScpe:2.3:o:cisco:aironet_3700p_firmware:*:*:*:*:*:*:*:*
cisco aironet 3700p firmware= 15.3(3)jd6nvdUScpe:2.3:o:cisco:aironet_3700p_firmware:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

cisco-sa-20190717-aironet-dosCisco IOS Access Points Software 802.11r Fast Transition Denial of Service Vulnerability2019-07-17csaf · cisco_csafUS
A vulnerability in the 802.11r Fast Transition (FT) implementation for Cisco IOS Access Points (APs) Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected interface. The vulnerability is due to a lack of complete error handling condition for client authentication requests sent to a targeted interface configured for FT. An attacker could exploit this vulnerability by sending crafted authentication request traffic to the targeted interface, causing the device to restart unexpectedly. Cisco has released software updates that address this vulnerability. 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-20190717-aironet-dos ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190717-aironet-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 2019-07-17modified 2026-06-17

references (11)

External citations — patches, advisories, analysis.

scry

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