What is CVE-2022-40718?

CVE-2022-40718 is a high-severity vulnerability in D-Link Dir-2150, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2023-01-26.

How severe is CVE-2022-40718?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in D-Link Dir-2150

CVE-2022-40718

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected D-Link DIR-2150 4.0.1 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the anweb service, which listens on TCP ports 80 and 443 by default. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-15728.

Vulnerability class: Buffer Overflow

Published 2023-01-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (47.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Weakness classification (CWE)

References

supportannouncement.us.dlink.com/announcement/publication.aspx (Patch, Vendor Advisory)
www.zerodayinitiative.com/advisories/ZDI-22-1221/ (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2022-40718?: CVE-2022-40718 is a high-severity vulnerability in D-Link Dir-2150, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2023-01-26.
How severe is CVE-2022-40718?: High severity. CVSS v3 base score is 8.8 out of 10.