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CVE-2022-34840

MEDIUM
6.5
CVSS Score
Published: December 7, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 04:51 AM UTC
18 products affected across 1 vendorWzr 600DHP FirmwareWzr 900DHP FirmwareWzr 600DHP2 Firmware

Using Buffalo network devices by BUFFALO INC.?

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Hw 450HP Zwe Firmware· Buffalo
95%
v ≤ 2.00
buffalo-hw-450hp-zwe (same device)
Wzr 300HP Firmware· Buffalo
95%
v ≤ 2.00
buffalo-wzr-300hp (same device)
Wzr 450HP Cwt Firmware· Buffalo
95%
v ≤ 2.00
buffalo-wzr-450hp-cwt (same device)
Wzr 450HP Firmware· Buffalo
95%
v ≤ 2.00
buffalo-wzr-450hp (same device)
Wzr 450HP Ub Firmware· Buffalo
95%
v ≤ 2.00
buffalo-wzr-450hp-ub (same device)
Wzr 600DHP Firmware· Buffalo
95%
v ≤ 2.00
buffalo-wzr-600dhp (same device)
Wzr 600DHP2 Firmware· Buffalo
95%
v ≤ 1.15
buffalo-wzr-600dhp2 (same device)
Wzr 900DHP Firmware· Buffalo
95%
v ≤ 1.15
buffalo-wzr-900dhp (same device)
Wzr D1100H Firmware· Buffalo
95%
v ≤ 2.00
buffalo-wzr-d1100h (same device)
Hw-450Hp-Zwe· Buffalodevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Third Party Advisory
Source: [email protected]
https://jvn.jp/en/vu/JVNVU92805279/index.html
PatchVendor Advisory
Source: [email protected]
https://www.buffalo.jp/news/detail/20221003-01.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMCISA-ADP
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-798

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