What’s Vulnerable › Vulnerabilities

CVE-2026-9105: Authenticated Stack-Based Buffer Overflow in TP-Link TL-WR841N Web Interface

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-29 · updated 2026-10-25
• Weakness: CWE-121

Description

An authenticated stack-based buffer overflow vulnerability exists in the web management interface of TP-Link TL-WR841N v14. A remote authenticated attacker can send crafted HTTP requests to cause the embedded web server to overflow a stack buffer, resulting in a crash of the affected process. Successful exploitation results in a denial-of-service condition, causing the device to crash and automatically reboot.

Affected products

• TP-Link TL-WR841N: before 14_260518 — fixed in 14_260518

How to fix

Upgrade to a fixed version: TP-Link TL-WR841N 14_260518. Check the vendor advisory for mitigations.

References

• https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware
• https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware
• https://www.tp-link.com/us/support/faq/5152/

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