CVE-2020-29557
Published: November 3, 2021
Official Description
D-Link DIR-825 R1 devices contain a buffer overflow vulnerability in the web interface that may allow for remote code execution.
CISA KEV Advisory
D-Link DIR-825 R1 Devices Buffer Overflow Vulnerability
D-Link DIR-825 R1 devices contain a buffer overflow vulnerability in the web interface that may allow for remote code execution.
Apply updates per vendor instructions.
Risk Analysis
This vulnerability is a buffer overflow in the web interface of D-Link DIR-825 R1 devices, potentially allowing remote code execution. Its high EPSS score of 0.89773 and inclusion in CISA's KEV confirm it is actively exploited and requires immediate attention.
Active exploitation of this vulnerability has been observed in the wild and it is listed in CISA's KEV, indicating confirmed real-world attacks. The flaw in the web interface suggests it is remotely exploitable.
Administrators should apply available firmware updates for D-Link DIR-825 R1 devices without delay. If updates are not available, consider isolating or replacing affected devices and restricting access to the web interface.
Technical Analysis
CVE-2020-29557 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2020-29557 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-29557 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1