What is CVE-2021-29294?

CVE-2021-29294 is a high-severity vulnerability in Dlink Dsl-2740r, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2021-08-10.

How severe is CVE-2021-29294?

High severity. CVSS v3 base score is 7.5 out of 10.

NULL pointer dereference in Dlink Dsl-2740r

CVE-2021-29294

Null Pointer Dereference vulnerability exists in D-Link DSL-2740R UK_1.01, which could let a remove malicious user cause a denial of service via the send_hnap_unauthorized function. It could be triggered by sending crafted POST request to /HNAP1/. NOTE: The DSL-2740R and all hardware revisions are considered End of Life and as such this issue will not be patched

Published 2021-08-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.011 (65.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Dlink Dsl-2740r
Dlink Dsl-2740r Firmware — versions uk_1.01

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

www.dlink.com/en/security-bulletin/ (Vendor Advisory)
supportannouncement.us.dlink.com/announcement/publication.aspx (Vendor Advisory)

Frequently asked questions

What is CVE-2021-29294?: CVE-2021-29294 is a high-severity vulnerability in Dlink Dsl-2740r, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2021-08-10.
How severe is CVE-2021-29294?: High severity. CVSS v3 base score is 7.5 out of 10.