CVE-2021-39613

Name: CVE-2021-39613
Creator: NVD / NIST
Published: 2021-08-23T22:15:28.657+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.71%

Last modified Jun 17, 2026

CVE-2021-39613 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. D-Link DVG-3104MS version 1.0.2.0.3, 1.0.2.0.4, and 1.0.2.0.4E contains hard-coded credentials for undocumented user accounts in the '/etc/passwd' file. As weak passwords have been used, the plaintext passwords can be recovered from the hash values. EPSS estimates a 1.71% chance of exploitation in the next 30 days.

Description

D-Link DVG-3104MS version 1.0.2.0.3, 1.0.2.0.4, and 1.0.2.0.4E contains hard-coded credentials for undocumented user accounts in the '/etc/passwd' file. As weak passwords have been used, the plaintext passwords can be recovered from the hash values. 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

1.71%

74.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Dlink	Dvg-3104ms Firmware	1.0.2.0.3
Dlink	Dvg-3104ms Firmware	1.0.2.0.4
Dlink	Dvg-3104ms Firmware	1.0.2.0.4e

References

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10237Vendor Advisory
https://www.dlink.com/en/security-bulletin/Vendor Advisory
https://www.nussko.com/advisories/advisory-2021-08-01.txtExploit, Third Party Advisory
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10237Vendor Advisory
https://www.dlink.com/en/security-bulletin/Vendor Advisory
https://www.nussko.com/advisories/advisory-2021-08-01.txtExploit, Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-39613?

How severe is CVE-2021-39613?

CVE-2021-39613 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.71% probability of exploitation in the next 30 days.

How do I fix CVE-2021-39613?

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-2021-39613?

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

Scan your code now

Source: NVD / NIST