CVE-2020-3920

Name: CVE-2020-3920
Creator: NVD / NIST
Published: 2020-03-27T04:15:10.77+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 0.84%

Last modified Jun 17, 2026

CVE-2020-3920 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. UltraLog Express device management interface does not properly perform access authentication in some specific pages/functions. Any user can access the privileged page to manage accounts through specific system directory.. EPSS estimates a 0.84% chance of exploitation in the next 30 days.

Description

UltraLog Express device management interface does not properly perform access authentication in some specific pages/functions. Any user can access the privileged page to manage accounts through specific system directory.

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

0.84%

53.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-306

Affected Software

Vendor	Product	Versions
Unisoon	Ultralog Express Firmware	1.4.0

References

https://www.twcert.org.tw/tw/cp-132-3452-937d6-1.htmlThird Party Advisory
https://www.twcert.org.tw/tw/cp-132-3452-937d6-1.htmlThird Party Advisory

Timeline

Published: Mar 27, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-3920?

How severe is CVE-2020-3920?

CVE-2020-3920 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.84% probability of exploitation in the next 30 days.

How do I fix CVE-2020-3920?

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-2020-3920?

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

Scan your code now

Source: NVD / NIST