CVE-2021-26827: tp-link tl-wr2041\+_firmware Classic Buffer Overflow

Vulnerability summary

CVE-2021-26827 is a high (CVSS 7.8) Classic Buffer Overflow vulnerability in tp-link tl-wr2041\+_firmware. EPSS estimates a 1.70% chance of exploitation in the next 30 days, higher than 77% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 14-04-2021
   PublishedVulnerability first disclosed.
2. 03-08-2024
   Last modifiedVulnerability information updated.

Description

Buffer Overflow in TP-Link WR2041 v1 firmware for the TL-WR2041+ router allows remote attackers to cause a Denial-of-Service (DoS) by sending an HTTP request with a very long "ssid" parameter to the "/userRpm/popupSiteSurveyRpm.html" webpage, which crashes the router.

• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.