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CVE-2020-3920
Unisoon UltraLog Express - Broken Authentication
High8.1EPSS 0.84%
- Published
- Updated
- Reserved
- Assigned by
- twcert
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.
Timeline
ID reserved
By twcert
- 3 months later
· 3 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| twcertCNA (assigner) | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| NVDNVD · Modified | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.84% · top 42% of all CVEs (7 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.
Weakness
- Broken Authentication
- CWE-306 (opens in a new tab)All about CWE-306 and its CVEs
Affected products
- affected 1.4.0
What to do
Solution: Update to V1.5.0 or later version.
References (1)
- https://www.twcert.org.tw/tw/cp-132-3452-937d6-1.html (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-3920)Record last updated .