CVE-2021-44864

Name: CVE-2021-44864
Creator: NVD / NIST
Published: 2022-02-08T15:15:07.597+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 10.19%

Last modified Jun 17, 2026

CVE-2021-44864 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. TP-Link WR886N 3.0 1.0.1 Build 150127 Rel.34123n is vulnerable to Buffer Overflow. Authenticated attackers can crash router httpd services via /userRpm/PingIframeRpm.htm request which contains redundant & in parameter.. EPSS estimates a 10.19% chance of exploitation in the next 30 days.

Description

TP-Link WR886N 3.0 1.0.1 Build 150127 Rel.34123n is vulnerable to Buffer Overflow. Authenticated attackers can crash router httpd services via /userRpm/PingIframeRpm.htm request which contains redundant & in parameter.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

10.19%

95.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions	Update
Tp-Link	Wn886n Firmware	1.0.1	Build 150127 Rel.34123n

References

https://github.com/zhlu32/cve/blob/main/tplink/wr886n/Tplink-wr886n-V3-Ping-DOS.mdExploit, Third Party Advisory
https://github.com/zhlu32/cve/blob/main/tplink/wr886n/Tplink-wr886n-V3-Ping-DOS.mdExploit, Third Party Advisory

Timeline

Published: Feb 8, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-44864?

How severe is CVE-2021-44864?

CVE-2021-44864 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 10.19% probability of exploitation in the next 30 days.

How do I fix CVE-2021-44864?

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-2021-44864?

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

Scan your code now

Source: NVD / NIST