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CVE-2022-37134

43
FAUCET Score

CVE-2022-37134 is a critical buffer overflow vulnerability affecting D-Link DIR-816 A2_v1.10CNB04.img firmware. Specifically, the /goform/form2Wan.cgi endpoint fails to properly validate the size of the base64-decoded l2tp_usrname when the wantype is set to 3, leading to a stack overflow. With a CVSS score of 9.8, this vulnerability is remotely exploitable with low attack complexity and no user interaction, allowing for complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion with 10 mentions, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
1.10cnb04CPE matchmatch criteria
cpe:2.3:o:dlink:dir-816_firmware:1.10cnb04:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
21.23%
Probability of exploitation in next 30 days
EPSS Percentile
97.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.2123 is in the 94th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / z1r00/IOT_Vul/blob/main/dlink/Dir816/form2Wan_cgi/readme.md
ExploitThird Party Advisory
dlink.com / en/security-bulletin
Vendor Advisory