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CVE-2022-34840

22
FAUCET Score

CVE-2022-34840 is a hard-coded credentials vulnerability affecting multiple Buffalo network devices, including various WZR series routers. A network-adjacent attacker can exploit this to alter device configuration settings. The vulnerability has a CVSS score of 6.5 (Medium) due to its low attack complexity and lack of required user interaction, leading to a high impact on integrity. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.00CPE matchmatch criteria
cpe:2.3:o:buffalo:wzr-300hp_firmware:*:*:*:*:*:*:*:*
<= 2.00CPE matchmatch criteria
cpe:2.3:o:buffalo:wzr-450hp_firmware:*:*:*:*:*:*:*:*
<= 2.00CPE matchmatch criteria
cpe:2.3:o:buffalo:wzr-600dhp_firmware:*:*:*:*:*:*:*:*
<= 1.15CPE matchmatch criteria
cpe:2.3:o:buffalo:wzr-900dhp_firmware:*:*:*:*:*:*:*:*
<= 2.00CPE matchmatch criteria
cpe:2.3:o:buffalo:hw-450hp-zwe_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.24%
Probability of exploitation in next 30 days
EPSS Percentile
15.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0024 is in the 21st percentile among its peer group of 1,802 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jvn.jp / en/vu/JVNVU92805279/index.html
Third Party Advisory
buffalo.jp / news/detail/20221003-01.html
PatchVendor Advisory