CVE-2019-18989

Name: CVE-2019-18989
Creator: NVD / NIST
Published: 2020-09-30T18:15:17.317+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.75%

Last modified Jun 17, 2026

CVE-2019-18989 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. A partial authentication bypass vulnerability exists on Mediatek MT7620N 1.06 devices. The vulnerability allows sending an unencrypted data frame to a WPA2-protected WLAN router where the packet is routed through the network. EPSS estimates a 0.75% chance of exploitation in the next 30 days.

Description

A partial authentication bypass vulnerability exists on Mediatek MT7620N 1.06 devices. The vulnerability allows sending an unencrypted data frame to a WPA2-protected WLAN router where the packet is routed through the network. If successful, a response is sent back as an encrypted frame, which would allow an attacker to discern information or potentially modify data.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.75%

50.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-290

Affected Software

Vendor	Product	Versions
Mediatek	Mt7620n Firmware	1.06

References

https://www.synopsys.com/blogs/software-security/cyrc-advisory-sept2020/Third Party Advisory
https://www.synopsys.com/blogs/software-security/cyrc-advisory-sept2020/Third Party Advisory

Timeline

Published: Sep 30, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-18989?

How severe is CVE-2019-18989?

CVE-2019-18989 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.75% probability of exploitation in the next 30 days.

How do I fix CVE-2019-18989?

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-2019-18989?

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

Scan your code now

Source: NVD / NIST