CVE-2022-25062

HIGH

TP-LINK TL-WR840N(ES)_V6.20_180709 - Denial of Service via Integer Overflow in dm_checkString

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2022-25062. PoCs published by exploitwritter.

AI-analyzed exploit summary This Python script exploits a buffer overflow vulnerability (CVE-2022-25062) in the TP-Link WR840N router by injecting malicious shellcode via the DNS module. It constructs a payload with ROP chains and shellcode to achieve remote code execution.

Description

TP-LINK TL-WR840N(ES)_V6.20_180709 was discovered to contain an integer overflow via the function dm_checkString. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.

Exploits (1)

nomisec WORKING POC
by exploitwritter · poc
https://github.com/exploitwritter/CVE-2022-25062

This Python script exploits a buffer overflow vulnerability (CVE-2022-25062) in the TP-Link WR840N router by injecting malicious shellcode via the DNS module. It constructs a payload with ROP chains and shellcode to achieve remote code execution.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: TP-Link WR840N router
Auth required
Prerequisites: Valid administrator credentials for the router · Network access to the target router
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Product x_refsource_misc
http://tp-link.com
Not Applicable, URL Repurposed x_refsource_misc
http://router.com

Scores

CVSS v3 7.5
EPSS 0.0450
EPSS Percentile 90.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-190
Status published
Products (1)
tp-link/tl-wr840n_firmware 6.20_180709
Published Feb 25, 2022
Tracked Since Feb 18, 2026