CVE-2021-39615

Name: CVE-2021-39615
Creator: NVD / NIST
Published: 2021-08-23T22:15:28.937+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.20%

Last modified Jun 17, 2026

CVE-2021-39615 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. D-Link DSR-500N version 1.02 contains hard-coded credentials for undocumented user accounts in the '/etc/passwd' file.If an attacker succeeds in recovering the cleartext password of the identified hash value, he will be able to log in via SSH or Telnet and thus gain access to the underlying embedded Linux operating system on the device. Fixed in version 2.12/2. EPSS estimates a 2.20% chance of exploitation in the next 30 days.

Description

D-Link DSR-500N version 1.02 contains hard-coded credentials for undocumented user accounts in the '/etc/passwd' file.If an attacker succeeds in recovering the cleartext password of the identified hash value, he will be able to log in via SSH or Telnet and thus gain access to the underlying embedded Linux operating system on the device. Fixed in version 2.12/2. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.20%

80.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-798

Affected Software

Vendor	Product	Versions
Dlink	Dsr-500n Firmware	1.02

References

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10235Vendor Advisory
https://www.dlink.com/en/security-bulletin/Vendor Advisory
https://www.nussko.com/advisories/advisory-2021-08-02.txtExploit, Third Party Advisory
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10235Vendor Advisory
https://www.dlink.com/en/security-bulletin/Vendor Advisory
https://www.nussko.com/advisories/advisory-2021-08-02.txtExploit, Third Party Advisory

Timeline

Published: Aug 23, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-39615?

How severe is CVE-2021-39615?

CVE-2021-39615 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.20% probability of exploitation in the next 30 days.

How do I fix CVE-2021-39615?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-39615?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST