CVE-2022-25062: tp-link tl-wr840n_firmware Integer Overflow or Wraparound

Vulnerability summary

CVE-2022-25062 is a high (CVSS 7.5) Integer Overflow or Wraparound vulnerability in tp-link tl-wr840n_firmware. EPSS estimates a 3.50% chance of exploitation in the next 30 days, higher than 89% of scored vulnerabilities.

Timeline

1. 25-02-2022
   PublishedVulnerability first disclosed.
2. 09-07-2026
   Last modifiedVulnerability information updated.

Description

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.

• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.