CVE-2021-29294

Name: CVE-2021-29294
Creator: NVD / NIST
Published: 2021-08-10T20:15:08.457+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.13%

Last modified Jun 17, 2026

CVE-2021-29294 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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/. EPSS estimates a 1.13% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.13%

62.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Dlink	Dsl-2740r Firmware	uk_1.01

References

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10213Vendor Advisory
https://www.dlink.com/en/security-bulletin/Vendor Advisory
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10213Vendor Advisory
https://www.dlink.com/en/security-bulletin/Vendor Advisory

Timeline

Published: Aug 10, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-29294?

How severe is CVE-2021-29294?

CVE-2021-29294 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.13% probability of exploitation in the next 30 days.

How do I fix CVE-2021-29294?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-29294?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST