CVE-2023-40039

Name: CVE-2023-40039
Creator: NVD / NIST
Published: 2023-09-11T07:15:08.123+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.88%

Last modified Jun 17, 2026

CVE-2023-40039 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered on ARRIS TG852G, TG862G, and TG1672G devices. A remote attacker (in proximity to a Wi-Fi network) can derive the default WPA2-PSK value by observing a beacon frame.. EPSS estimates a 0.88% chance of exploitation in the next 30 days.

Description

An issue was discovered on ARRIS TG852G, TG862G, and TG1672G devices. A remote attacker (in proximity to a Wi-Fi network) can derive the default WPA2-PSK value by observing a beacon frame.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.88%

54.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-284

Affected Software

Vendor	Product	Versions
Arris	Tg852g Firmware	All versions
Arris	Tg862g Firmware	All versions
Arris	Tg1672g Firmware	All versions

References

https://github.com/actuator/cve/blob/main/Arris/CVE-2023-40039Third Party Advisory
https://i.ebayimg.com/images/g/-UcAAOSwDe1kyD-Z/s-l1600.pngProduct
https://i.ebayimg.com/images/g/4P0AAOSwdhxkrZtt/s-l1600.jpgProduct
https://github.com/actuator/cve/blob/main/Arris/CVE-2023-40039Third Party Advisory
https://i.ebayimg.com/images/g/-UcAAOSwDe1kyD-Z/s-l1600.pngProduct
https://i.ebayimg.com/images/g/4P0AAOSwdhxkrZtt/s-l1600.jpgProduct

Timeline

Published: Sep 11, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-40039?

An issue was discovered on ARRIS TG852G, TG862G, and TG1672G devices. A remote attacker (in proximity to a Wi-Fi network) can derive the default WPA2-PSK value by observing a beacon frame.

How severe is CVE-2023-40039?

CVE-2023-40039 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.88% probability of exploitation in the next 30 days.

How do I fix CVE-2023-40039?

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-2023-40039?

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

Scan your code now

Source: NVD / NIST