CVE-2022-29402 json
TP-Link TL-WR840N EU v6.20 was discovered to contain insecure protections for its UART console.
published 2022-05-25 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-33741
- cvss
- 6.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 37%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- k4m1ll0.com https://k4m1ll0.com/cve-tplink-tlwr840N-uart-shell.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.8 | CVSS:3.1/AC:L/AV:P/A:H/C:H/I:H/PR:N/S:U/UI:N |
| CNA | 3.1 | 6.8 | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 6.8 | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.2 | AV:L/AC:L/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-306 Missing Authentication for Critical Functionality
References
-
k4m1ll0.com
/cve-tplink-tlwr840N-uart-shell.html
exploit, third-party-advisory
Sources
- CVE List CVE-2022-29402
- NVD CVE-2022-29402
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