CVE-2022-37134

Dir 816 Firmware vulnerability

CVSS

9.8

EPSS

21.2%

EPSS pct

97th

Exploited

No known

D-link DIR-816 A2_v1.10CNB04.img is vulnerable to Buffer Overflow via /goform/form2Wan.cgi. When wantype is 3, l2tp_usrname will be decrypted by base64, and the result will be stored in v94, which does not check the size of l2tp_usrname, resulting in stack overflow.

Affected vendor

Dlink

Affected product

Dir 816 Firmware

CVSS vector

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

Weakness type (CWE)

CWE-1284

Published

2022-08-22

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 21.2% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2022-37134

Confirm whether Dlink Dir 816 Firmware is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2022-37134.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2022-37134

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2022-37134 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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