CVE-2021-44864: tp-link wn886n_firmware Classic Buffer Overflow

Modified

Published 08-02-2022Last modified 04-08-2024

Vulnerability summary

CVE-2021-44864 is a medium (CVSS 6.5) Classic Buffer Overflow vulnerability in tp-link wn886n_firmware. EPSS estimates a 10.19% chance of exploitation in the next 30 days, higher than 95.6% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk

38/100

0100

Medium · default modelHow is this calculated?

CVSS score

6.5/10

010

Medium · v3.1 (NVD)

EPSS score

10.19%

0%100%

Medium · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits1github

Timeline

08-02-2022
PublishedVulnerability first disclosed.
04-08-2024
Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 1 source · 2 versions

v3.16.5v2.04.0

EPSS trend

Probability

10.19%

Chance of exploitation in the next 30 days

Percentile

96%

Versus all other CVEs

30-day change

No change 0.00 pp

From 10.19% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found

githubUnverified
Cve
Maturity: poc

Weaknesses

CWE · root cause

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

Affected systems

Tp-link1 product

wn886n_firmware1.0.1:build_150127_rel.34123n

1 vendor · 1 product

References

1 links

github.com/zhlu32/cve/blob/main/tplink/wr886n/Tplink-wr886n-V3-Ping-DOS.mdX Refsource MISCExploitThird Party Advisory