CVE-2021-34829

Name: CVE-2021-34829
Creator: NVD / NIST
Published: 2021-07-15T18:15:09.417+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 2.33%

Last modified Jun 17, 2026

CVE-2021-34829 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-1330 1.13B01 BETA routers. Authentication is not required to exploit this vulnerability. EPSS estimates a 2.33% chance of exploitation in the next 30 days.

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-1330 1.13B01 BETA routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the HNAP_AUTH HTTP header. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length buffer. An attacker can leverage this vulnerability to execute code in the context of the device. Was ZDI-CAN-12065.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

2.33%

81.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions	Update
Dlink	Dap-1330 Firmware	1.13b01	Beta

References

https://www.zerodayinitiative.com/advisories/ZDI-21-681/Third Party Advisory, VDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-21-681/Third Party Advisory, VDB Entry

Timeline

Published: Jul 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-34829?

How severe is CVE-2021-34829?

CVE-2021-34829 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.33% probability of exploitation in the next 30 days.

How do I fix CVE-2021-34829?

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-2021-34829?

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

Scan your code now

Source: NVD / NIST