🛡️ CVE-2022-29402 — tl-wr840n-firmware

🟡 CVSS 6.8 — Medium ⚠️ Exploit Public CWE-306 NVD
6.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

TP-Link TL-WR840N EU v6.20 was discovered to contain insecure protections for its UART console. This vulnerability allows attackers to connect to the UART port via a serial connection and execute commands as the root user without authentication.

How this vulnerability can be exploited

This issue can be reached with physical access to the device, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2022-29402 is classified as CWE-306: Missing Authentication for Critical Function. A sensitive function can be reached without authenticating at all.

Affected software

CVE-2022-29402 is recorded against 1 package.

  • tl-wr840n-firmware

Timeline and source

Published on 25 May 2022 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

k4m1ll0.com
k4m1ll0.com

Details

Severity MEDIUM
CVSS Score 6.8
CVSS Vector CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE CWE-306
Public Exploit ⚠️ Yes
Source NVD
Published 2022-05-25
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
tl-wr840n-firmware — —

References

Similar Threats

Exploit Protection

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CVE-2022-29402 carries CVSS 6.8 Medium rating and a public exploit already exists. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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