CVE-2022-34840

Name: CVE-2022-34840
Creator: NVD / NIST
Published: 2022-12-07T10:15:10.303+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.24%

Last modified Jun 17, 2026

CVE-2022-34840 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Use of hard-coded credentials vulnerability in multiple Buffalo network devices allows a network-adjacent attacker to alter?configuration settings of the device. The affected products/versions are as follows: WZR-300HP firmware Ver. EPSS estimates a 0.24% chance of exploitation in the next 30 days.

Description

Use of hard-coded credentials vulnerability in multiple Buffalo network devices allows a network-adjacent attacker to alter?configuration settings of the device. The affected products/versions are as follows: WZR-300HP firmware Ver. 2.00 and earlier, WZR-450HP firmware Ver. 2.00 and earlier, WZR-600DHP firmware Ver. 2.00 and earlier, WZR-900DHP firmware Ver. 1.15 and earlier, HW-450HP-ZWE firmware Ver. 2.00 and earlier, WZR-450HP-CWT firmware Ver. 2.00 and earlier, WZR-450HP-UB firmware Ver. 2.00 and earlier, WZR-600DHP2 firmware Ver. 1.15 and earlier, and WZR-D1100H firmware Ver. 2.00 and earlier.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.24%

15.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Buffalo	Wzr-300hp Firmware	<= 2.00
Buffalo	Wzr-450hp Firmware	<= 2.00
Buffalo	Wzr-600dhp Firmware	<= 2.00
Buffalo	Wzr-900dhp Firmware	<= 1.15
Buffalo	Hw-450hp-Zwe Firmware	<= 2.00
Buffalo	Wzr-450hp-Cwt Firmware	<= 2.00
Buffalo	Wzr-450hp-Ub Firmware	<= 2.00
Buffalo	Wzr-600dhp2 Firmware	<= 1.15
Buffalo	Wzr-D1100h Firmware	<= 2.00

References

https://jvn.jp/en/vu/JVNVU92805279/index.htmlThird Party Advisory
https://www.buffalo.jp/news/detail/20221003-01.htmlPatch, Vendor Advisory
https://jvn.jp/en/vu/JVNVU92805279/index.htmlThird Party Advisory
https://www.buffalo.jp/news/detail/20221003-01.htmlPatch, Vendor Advisory

Timeline

Published: Dec 7, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-34840?

How severe is CVE-2022-34840?

CVE-2022-34840 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.

How do I fix CVE-2022-34840?

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-2022-34840?

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

Scan your code now

Source: NVD / NIST