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CVE-2022-40966

28
FAUCET Score

CVE-2022-40966 is an authentication bypass vulnerability affecting numerous Buffalo network devices, including routers and access points across various firmware versions. A network-adjacent attacker can exploit this flaw to gain unauthorized access to the device. The vulnerability carries a high CVSS score of 8.8, indicating a low attack complexity and the potential for complete compromise of confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage regarding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.87CPE matchmatch criteria
cpe:2.3:o:buffalo:wcr-300_firmware:*:*:*:*:*:*:*:*
<= 2.00CPE matchmatch criteria
cpe:2.3:o:buffalo:whr-hp-g300n_firmware:*:*:*:*:*:*:*:*
<= 1.87CPE matchmatch criteria
cpe:2.3:o:buffalo:whr-hp-gn_firmware:*:*:*:*:*:*:*:*
<= 1.88CPE matchmatch criteria
cpe:2.3:o:buffalo:wpl-05g300_firmware:*:*:*:*:*:*:*:*
<= 2.85CPE matchmatch criteria
cpe:2.3:o:buffalo:wrm-d2133hp_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.34%
Probability of exploitation in next 30 days
EPSS Percentile
26.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0034 is in the 24th percentile among its peer group of 1,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 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