CVE-2025-60679: dlink dir-816_firmware Stack-based Buffer Overflow

Vulnerability summary

CVE-2025-60679 is a high (CVSS 8.8) Stack-based Buffer Overflow vulnerability in dlink dir-816_firmware. EPSS estimates a 0.71% chance of exploitation in the next 30 days, higher than 52.8% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 13-11-2025
   PublishedVulnerability first disclosed.
2. 05-07-2026
   Last modifiedVulnerability information updated.

Description

A stack buffer overflow vulnerability exists in the D-Link DIR-816A2 router firmware DIR-816A2_FWv1.10CNB05_R1B011D88210.img in the upload.cgi module, which handles firmware version information. The vulnerability occurs because /proc/version is read into a 512-byte buffer and then concatenated using sprintf() into another 512-byte buffer containing a 29-byte constant. Input exceeding 481 bytes triggers a stack buffer overflow, allowing an attacker who can control /proc/version content to potentially execute arbitrary code on the device.

• CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).