What’s Vulnerable › Vulnerabilities

CVE-2026-17250: Authenticated Remote Code Execution via Stack-Based Buffer Overflow in Firmware Update Handling

• Severity: high (CVSS 8.5 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-21 · updated 2026-10-14
• Weakness: CWE-121

Description

A stack-based buffer overflow vulnerability exists in the firmware update functionality of TL-MR6400 v7 due to unsafe processing of attacker-controlled metadata within a firmware image. Successful exploitation may allow an authenticated attacker to trigger memory corruption and execute arbitrary code on the affected device.

Affected products

• TP-Link Systems Inc. TL-MR6400 v7.0: before 1.9.0 Build 260714 — fixed in 1.9.0 Build 260714

How to fix

Upgrade to a fixed version: TP-Link Systems Inc. TL-MR6400 v7.0 1.9.0 Build 260714. Check the vendor advisory for mitigations.

References

• https://www.tp-link.com/en/support/download/tl-mr6400/v7/#Firmware
• https://www.tp-link.com/tw/support/download/tl-mr6400/v7/#Firmware
• https://www.tp-link.com/us/support/faq/5259/

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