CVE-2025-61577: dlink dir-816_firmware Stack-based Buffer Overflow

Vulnerability summary

CVE-2025-61577 is a high (CVSS 7.5) Stack-based Buffer Overflow vulnerability in dlink dir-816_firmware. EPSS estimates a 5.71% chance of exploitation in the next 30 days, higher than 92.9% of scored vulnerabilities. 2 public exploits are recorded.

Timeline

1. 09-10-2025
   PublishedVulnerability first disclosed.
2. 09-10-2025
   Last modifiedVulnerability information updated.

Description

D-Link DIR-816A2_FWv1.10CNB05 was discovered to contain a stack overflow via the statuscheckpppoeuser parameter in the dir_setWanWifi function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted input.

• 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).