CVE-2019-1920

Name: CVE-2019-1920
Creator: NVD / NIST
Published: 2019-07-17T21:15:12.093+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 0.80%

Last modified Jun 17, 2026

CVE-2019-1920 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. 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. EPSS estimates a 0.80% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.4/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS Probability

0.80%

51.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Cisco	Aironet 3700e Firmware	15.3\(3\)jc14
Cisco	Aironet 3700e Firmware	15.3\(3\)jd6
Cisco	Aironet 3700i Firmware	15.3\(3\)jc14
Cisco	Aironet 3700i Firmware	15.3\(3\)jd6
Cisco	Aironet 3700p Firmware	15.3\(3\)jc14
Cisco	Aironet 3700p Firmware	15.3\(3\)jd6
Cisco	Access Points	< 8.2.170.0
Cisco	Access Points	>= 8.3, < 8.3.150.0
Cisco	Access Points	>= 8.4, < 8.5.131.0
Cisco	Access Points	>= 8.6, < 8.8.100.0

References

http://www.securityfocus.com/bid/109312Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190717-aironet-dosVendor Advisory
http://www.securityfocus.com/bid/109312Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190717-aironet-dosVendor Advisory

Timeline

Published: Jul 17, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-1920?

How severe is CVE-2019-1920?

CVE-2019-1920 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 0.80% probability of exploitation in the next 30 days.

How do I fix CVE-2019-1920?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-1920?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST