CVE-2025-10666: d-link dir-825

Vulnerability summary

CVE-2025-10666 is a critical (CVSS 9.8) vulnerability in d-link dir-825. EPSS estimates a 3.37% chance of exploitation in the next 30 days, higher than 88.6% of scored vulnerabilities. 2 public exploits are recorded.

Timeline

1. 18-09-2025
   PublishedVulnerability first disclosed.
2. 03-02-2026
   Last modifiedVulnerability information updated.

Description

A security flaw has been discovered in D-Link DIR-825 up to 2.10. Affected by this vulnerability is the function sub_4106d4 of the file apply.cgi. The manipulation of the argument countdown_time results in buffer overflow. The attack can be executed remotely. The exploit has been released to the public and may be exploited. This vulnerability only affects products that are no longer supported by the maintainer.

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
• 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.