CVE-2020-3935TAIWAN SECOM CO., LTD. – Sensitivity Information Exposure
- 7.5HighCVSS base score
- 0.93%Exploitation in 30 daysEPSS · top 39% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
TAIWAN SECOM CO., LTD., a Door Access Control and Personnel Attendance Management system, stores users’ information by cleartext in the cookie, which divulges password to attackers.
Timeline
ID reserved
By twcert
- 53 days later
· 53 days later
Published
- 5 years later
· 5 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 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.93% · top 39% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
TAIWAN SECOM CO., LTD. · Door Access Control system
- affected ≤ 3.3.2
TAIWAN SECOM CO., LTD. · Personnel Attendance system
- affected ≤ 3.3.0.3_20160517
What to do
Solution: Update to: Door Access Control system ver. 3.5.4 Personnel Attendance system prior to ver. 3.4.0.0.3.05_20191112
References
References3
- https://www.chtsecurity.com/news/1bb85fcd-9048-4587-b4d3-b18335572bac (opens in a new tab)x_refsource_MISCx_transferred
- https://gist.github.com/chtsecurity/4db471b34c3959e5ab9ec31570e4760b (opens in a new tab)x_refsource_MISCx_transferred
- https://www.twcert.org.tw/en/cp-139-3319-d7b65-2.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)
- EUVD EUVD-2020-25200 (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://cveledger.app/cve/CVE-2020-3935)Record last updated .