CVE-2020-29557: D-Link DIR-825 R1 Devices Buffer Overflow Vulnerability
An issue was discovered on D-Link DIR-825 R1 devices through 3.0.1 before 2020-11-20. A buffer overflow in the web interface allows attackers to achieve pre-authentication remote code execution.
Published Jan 29, 2021 · Updated Jun 17, 2026
Required action
Apply updates per vendor instructions.
Advisory details
From the National Vulnerability Database. This product uses the NVD API but is not endorsed or certified by the NVD.
An issue was discovered on D-Link DIR-825 R1 devices through 3.0.1 before 2020-11-20. A buffer overflow in the web interface allows attackers to achieve pre-authentication remote code execution.
References
How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology
More D-Link vulnerabilities
All D-Link entriesCVE-2025-29635
D-Link DIR-823X Command Injection Vulnerability
high7.2ExploitedMar 25, 2025CVE-2024-3272
D-Link Multiple NAS Devices Use of Hard-Coded Credentials Vulnerability
critical9.8ExploitedApr 4, 2024CVE-2024-3273
D-Link Multiple NAS Devices Command Injection Vulnerability
critical9.8ExploitedApr 4, 2024CVE-2024-0769
D-Link DIR-859 Router Path Traversal Vulnerability
critical9.8ExploitedJan 21, 2024CVE-2023-25280
D-Link DIR-820 Router OS Command Injection Vulnerability
critical9.8ExploitedMar 16, 2023CVE-2022-40799
D-Link DNR-322L Download of Code Without Integrity Check Vulnerability
high8.8ExploitedNov 29, 2022