CVE-2021-39615 describes a critical vulnerability in D-Link DSR-500N routers, specifically version 1.02, stemming from hard-coded credentials for undocumented user accounts in the /etc/passwd file. An unauthenticated attacker can exploit this by recovering the cleartext password, gaining full access to the underlying embedded Linux operating system via SSH or Telnet, leading to complete compromise of the device. This vulnerability carries a CVSS score of 9.8 (CRITICAL) due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While no public exploit intelligence (Metasploit, Nuclei, ExploitDB) or active exploitation has been observed, and community discussion is minimal, the high CVSS score indicates its severe potential. It is important to note that this vulnerability affects products no longer supported by the vendor, making patching impossible.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
1.02CPE matchmatch criteria | cpe:2.3:o:dlink:dsr-500n_firmware:1.02:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.