CVE-2022-25062: TP-Link Tl-WR840N Firmware

High severity, CVSS 7.5. EPSS: 3.5% chance of exploitation in the next 30 days.

TP-LINK TL-WR840N(ES)_V6.20_180709 was discovered to contain an integer overflow via the function dm_checkString. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.

Affected products

• TP-Link Tl-WR840N Firmware: version 6.20_180709 only

Published 2022-02-25. Last modified 2026-07-09.