CVE-2022-34840

6.5 MEDIUM 0.3% exploit odds Fix listed

What it is

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.

At a glance

Exploitability: Can be exploited from the same network segment without logging in. High risk of data tampering.
Exploit odds: 0.3% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2022-12-07 10:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 04:51 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.3% in the next 30 days (EPSS).
Severity: 6.5 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2022-12-07 10:15 UTC
Last modified: 2026-06-17 04:51 UTC
Exploit probability: 0.3% · EPSS, next 30 days
Weakness: CWE-798 · Hard-coded credentials
Record status: Modified

Affected

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

Attack profile CVSS 3.1 · 6.5

Attack vector: Adjacent network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: High
Availability: None

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2022-34840.md and follow it. Check whether this project is affected by CVE-2022-34840. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record