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CVE

CVE-2022-34840

Use of hard-coded credentials vulnerability in multiple Buffalo network devices allows a network-adjacent attacker to al

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.

MEDIUM · CVSS 6.5 EPSS 0.0007
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-798Use of Hard-coded Credentials
CWE-798Use of Hard-coded Credentials
▤

Affected Products & Versions

9
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
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · vultures@jpcert.or.jp
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD07 Dec 2022 · 10:15 AM
CVSS VectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://jvn.jp/en/vu/JVNVU92805279/index.htmlThird Party Advisory
https://www.buffalo.jp/news/detail/20221003-01.htmlPatchVendor Advisory
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