CVE-2020-29557
D-Link DIR-825 R1 Devices Buffer Overflow Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 3 May 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 55.75% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 3 November 2021 · due 3 May 2022
- Weakness
- CWE-119
- Affected
- dlink/dir-825 r1 firmware
- Source
- cve@mitre.org
EPSS moved from 55.7% on 24 October 2026 to 55.7% on 30 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2020-29557
References
- https://shaqed.github.io/dlink/Broken Link, Exploit, Third Party Advisory
- https://www.dlink.ru/ru/download2/5/19/2354/441/Product
- https://shaqed.github.io/dlink/Broken Link, Exploit, Third Party Advisory
- https://www.dlink.ru/ru/download2/5/19/2354/441/Product
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-29557US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.