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

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.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

• Attack vector: Physical — the attacker has to touch the device.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: High — total loss, or loss the attacker controls.
• Availability impact: High — total loss, or loss the attacker controls.

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

Other advisories for this package

tl-wr840n-firmware has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2026-3227 (6.8 Medium, published 16 Mar 2026)
• CVE-2023-39471 (8.8 High, published 3 May 2024)
• CVE-2022-26640 (7.2 High, published 28 Mar 2022)
• CVE-2022-26639 (7.2 High, published 28 Mar 2022)
• CVE-2022-26642 (7.2 High, published 28 Mar 2022)
• CVE-2022-26641 (7.2 High, published 28 Mar 2022)
• CVE-2022-25064 (9.8 Critical, published 25 Feb 2022)
• CVE-2022-25062 (7.5 High, published 25 Feb 2022)

Same weakness in other software

These advisories are the same class of weakness (CWE-306: Missing Authentication for Critical Function) in other software:

• CVE-2026-18941 (7.7 High, published 10 Aug 2026)
• CVE-2025-15681 (published 10 Aug 2026)
• CVE-2026-15581 (8.0 High, published 10 Aug 2026)
• CVE-2025-71409 (7.1 High, published 7 Aug 2026)
• CVE-2026-24079 (8.1 High, published 4 Aug 2026)
• CVE-2026-17348 (6.5 Medium, published 31 Jul 2026)
• CVE-2026-15978 (7.5 High, published 30 Jul 2026)
• CVE-2026-12722 (8.2 High, published 30 Jul 2026)

Details

Affected Packages

References