Unisoon UltraLog Express - Broken Authentication

published 2020-03-27 6y ago modified 2026-06-17 4mo ago also EUVD-2020-25185

cvss: 8.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits: 0; none known

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.

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Exploit prediction

0.84% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
NVD	3.1	8.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
NVD	2.0	5.5	AV:N/AC:L/Au:S/C:P/I:P/A:N

Affected products

Unisoon UltraLog Express

Classification

Weakness

CWE-306 Missing Authentication for Critical Functionality

References

twcert.org.tw /tw/cp-132-3452-937d6-1.html
third-party-advisory

Sources

CVE List CVE-2020-3920
NVD CVE-2020-3920

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