CVE-2021-34201

Name: CVE-2021-34201
Creator: NVD / NIST
Published: 2021-06-16T20:15:07.573+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 0.59%

Last modified Jun 17, 2026

CVE-2021-34201 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. D-Link DIR-2640-US 1.01B04 is vulnerable to Buffer Overflow. There are multiple out-of-bounds vulnerabilities in some processes of D-Link AC2600(DIR-2640). EPSS estimates a 0.59% chance of exploitation in the next 30 days.

Description

D-Link DIR-2640-US 1.01B04 is vulnerable to Buffer Overflow. There are multiple out-of-bounds vulnerabilities in some processes of D-Link AC2600(DIR-2640). Local ordinary users can overwrite the global variables in the .bss section, causing the process crashes or changes.

Metrics

CVSS 3.1

7.1/10

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

EPSS Probability

0.59%

43.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Dlink	Dir-2640-Us Firmware	1.01b04

References

http://d-link.comProduct
http://dir-2640-us.comProduct, URL Repurposed
https://github.com/liyansong2018/CVE/tree/main/2021/CVE-2021-34201Exploit, Third Party Advisory
https://www.dlink.com/en/security-bulletin/Vendor Advisory
http://d-link.comProduct
http://dir-2640-us.comProduct, URL Repurposed
https://github.com/liyansong2018/CVE/tree/main/2021/CVE-2021-34201Exploit, Third Party Advisory
https://www.dlink.com/en/security-bulletin/Vendor Advisory

Timeline

Published: Jun 16, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-34201?

How severe is CVE-2021-34201?

CVE-2021-34201 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.59% probability of exploitation in the next 30 days.

How do I fix CVE-2021-34201?

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-2021-34201?

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

Scan your code now

Source: NVD / NIST