CVE-2021-29280

Name: CVE-2021-29280
Creator: NVD / NIST
Published: 2021-08-19T16:15:12.197+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.4/10EPSS 0.75%

Last modified Jun 17, 2026

CVE-2021-29280 is a medium-severity vulnerability rated 6.4/10 on the CVSS scale. In TP-Link Wireless N Router WR840N an ARP poisoning attack can cause buffer overflow. EPSS estimates a 0.75% chance of exploitation in the next 30 days.

Description

In TP-Link Wireless N Router WR840N an ARP poisoning attack can cause buffer overflow

Metrics

CVSS 3.1

6.4/10

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

EPSS Probability

0.75%

50.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-668

Affected Software

Vendor	Product	Versions
Tp-Link	Tl-Wr840n Firmware	All versions

References

https://github.com/deadlysnowman3308/upgraded-ARP-PoisoningExploit, Third Party Advisory
https://hackingvila.wordpress.com/2021/04/28/upgraded-arp-poisoning-tool/Third Party Advisory
https://github.com/deadlysnowman3308/upgraded-ARP-PoisoningExploit, Third Party Advisory
https://hackingvila.wordpress.com/2021/04/28/upgraded-arp-poisoning-tool/Third Party Advisory

Timeline

Published: Aug 19, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-29280?

In TP-Link Wireless N Router WR840N an ARP poisoning attack can cause buffer overflow

How severe is CVE-2021-29280?

CVE-2021-29280 has a CVSS score of 6.4/10 (MEDIUM severity). The EPSS model estimates a 0.75% probability of exploitation in the next 30 days.

How do I fix CVE-2021-29280?

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-2021-29280?

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

Scan your code now

Source: NVD / NIST