CyberSecBulletin
CVE-2026-0834NVD status: Modified

Archer C20 v6.0, Archer AX53 v1.0: Authentication Bypass by Spoofing

Published Updated By the CyberSecBulletin desk

CVE-2026-0834 is a high-severity authentication bypass by spoofing vulnerability in Archer C20 v6.0, Archer AX53 v1.0 from TP-Link, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. The record lists versions V6_251031, V1_251215 as the first without the flaw, so updating Archer C20 v6.0, Archer AX53 v1.0 to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.43% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Archer C20 v6.0, Archer AX53 v1.0 to V6_251031 or V1_251215, whichever matches your release line, or a later version.
  2. Update Archer C20 V5 to US_V5_260419 or EU_V5_260317, whichever matches your release line, or a later version.
  3. Update TL-WR841N v13 to 0.9.1 Build 20231120 Rel.62366 or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
TP-LinkArcher C20 v6.0, Archer AX53 v1.0before V6_251031; before V1_251215V6_251031, V1_251215
TP-LinkArcher C20 V5before US_V5_260419; before EU_V5_260317US_V5_260419, EU_V5_260317
TP-LinkTL-WR841N v13before 0.9.1 Build 20231120 Rel.623660.9.1 Build 20231120 Rel.62366
TP-LinkArcher Ax53 Firmware1.0Not stated
TP-LinkArcher C20 Firmware6.0Not stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
AdjacentThe attacker must be on the same local network segment.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 4.07.2HighCNA
CVSS 3.18.8HighNVD

Official description

Logic vulnerability in TP-Link Archer C20 v5, 6.0, Archer AX53 v1.0 and TL-WR841N v13 (TDDP module) allows unauthenticated adjacent attackers to execute administrative commands including factory reset and device reboot without credentials. Attackers on the adjacent network can remotely trigger factory resets and reboots without credentials, causing configuration loss and interruption of device availability. This issue affects Archer C20 v6.0 < V6_251031, Archer C20 v5 <EU_V5_260317 or < US_V5_260419 Archer AX53 v1.0 < V1_251215 TL-WR841N v13 < 0.9.1 Build 20231120 Rel.62366

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Authentication Bypass by Spoofing

This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.

More Authentication Bypass by Spoofing vulnerabilities (CWE-290)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Recent Authentication Bypass by Spoofing vulnerabilities

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