What’s Vulnerable › Vulnerabilities

CVE-2026-75118: http_gdpr_decrypt Pre-Authentication Stack-Based Buffer Overflow

• Severity: high (CVSS 8.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-09-01
• Weakness: CWE-121

Description

A pre-authentication stack-based buffer overflow vulnerability exists in the http_gdpr_decrypt function of TL-MR100 V3.20 due to insufficient bounds checking of encrypted requests to the /cgi/login endpoint. An adjacent unauthenticated attacker with access to the router's web management interface can trigger memory corruption and potentially achieve arbitrary code execution. Successful exploitation can overwrite saved control-flow data on the httpd process stack prior to authentication, resulting in a service crash or potential arbitrary code execution in the context of the affected process.

Affected products

• TP-Link Systems Inc. TL-MR100 v3.20: before (EU)_1.3.0 Build 260609 — fixed in (EU)_1.3.0 Build 260609

How to fix

Upgrade to a fixed version: TP-Link Systems Inc. TL-MR100 v3.20 (EU)_1.3.0 Build 260609. Check the vendor advisory for mitigations.

References

• https://www.tp-link.com/en/support/download/tl-mr100/v3.20/#Firmware
• https://www.tp-link.com/en/support/faq/5271/

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