# Hardcoded Credential Vulnerability in Multiple TP-Link Router Models

CVE record · `CVE-2026-12001`

- **Identifiers:** `CVE-2026-12001`
- **State:** Confirmed
- **Severity:** CVSS 5.2 Medium
- **Critical:** No
- **CNA:** TPLink
- **Weakness (CWE):** [CWE-798](https://cwe.mitre.org/data/definitions/798.html)
- **Tags:** [Hard-coded credentials](https://agentprime.io/advisories/tag/hard-coded-credentials.md)
- **Technologies:** [TP-Link Systems Inc. TL-WR850N v3](https://agentprime.io/advisories/technology/tp-link-systems-inc-tl-wr850n-v3.md) · [TP-Link Systems Inc. Archer C20 v6](https://agentprime.io/advisories/technology/tp-link-systems-inc-archer-c20-v6.md) · [TP Link Systems Inc. TL-WR845N v4](https://agentprime.io/advisories/technology/tp-link-systems-inc-tl-wr845n-v4.md) · [TP-Link Systems Inc. Archer MR200 v5](https://agentprime.io/advisories/technology/tp-link-systems-inc-archer-mr200-v5.md) · [TP Link Systems Inc. TL-WR902AC v4](https://agentprime.io/advisories/technology/tp-link-systems-inc-tl-wr902ac-v4.md)
- **Published:** 27 Jul 2026
- **Updated:** 11 Aug 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: TPLink) at 27 Jul 2026, 20:08 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: TP-Link Systems Inc.. Product: TL-WR850N v3.
  - affected: `before TL-WR850N(IN)_V3.48_3.16.0 Build 260422_2048` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: Archer C20 v6.
  - affected: `before Archer C20(US)_V6_250630` (custom)
  - Other versions: unaffected
- Vendor: TP Link Systems Inc.. Product: TL-WR845N v4.
  - affected: `before TL-WR845N(UN)_V4_250401` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: Archer MR200 v5.
  - affected: `before EU_V5.20_1.3.0 Build 260319` (custom)
  - Other versions: unaffected
- Vendor: TP Link Systems Inc.. Product: TL-WR902AC v4.
  - affected: `before US_V4_0.9.1 Build 260810` (custom)
  - affected: `before EU_V4_0.9.3 Build 260728` (custom)
  - Other versions: unaffected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 5.2 Medium, CVSS 4.0: `CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N`, from CNA (TPLink)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0034, the 28th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 27 Jul 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-12001](https://www.cve.org/CVERecord?id=CVE-2026-12001)
- [NVD: CVE-2026-12001](https://nvd.nist.gov/vuln/detail/CVE-2026-12001)

### References from the CNA

- <https://www.tp-link.com/en/support/download/archer-mr200/v5/#Firmware> (patch)
- <https://www.tp-link.com/in/support/download/archer-mr200/v5/#Firmware> (patch)
- <https://www.tp-link.com/en/support/download/archer-c20/v6/#Firmware> (patch)
- <https://www.tp-link.com/us/support/download/archer-c20/v6/#Firmware> (patch)
- <https://www.tp-link.com/in/support/download/archer-c20/v6/#Firmware> (patch)
- <https://www.tp-link.com/en/support/download/tl-wr845n/#Firmware> (patch)
- <https://www.tp-link.com/in/support/download/tl-wr845n/#Firmware> (patch)
- <https://www.tp-link.com/in/support/download/tl-wr850n/#Firmware> (patch)
- <https://www.tp-link.com/us/support/faq/5210/> (vendor-advisory)
- <https://www.tp-link.com/us/support/download/tl-wr902ac/v4/#Firmware> (patch)
- <https://www.tp-link.com/en/support/download/tl-wr902ac/v4/#Firmware> (patch)

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-12001>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-12001/>. Everything for agents: <https://agentprime.io/llms.txt>.