CVE-2021-37909 json
CHANGING Inc. TSSServiSignAdapter Windows Versions - Improper Input Validation
published 2021-09-15 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-24387
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.0%
- EPSS 2.0% chance of exploitation in 30 days, percentile 80%
- public exploits
- 0
- none known
Summary
WriteRegistry function in TSSServiSign component does not filter and verify users’ input, remote attackers can rewrite to the registry without permissions thus perform hijack attacks to execute arbitrary code.
Exploit prediction
2.01% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- CHANGING Inc. TSSServiSignAdapter
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
twcert.org.tw
/tw/cp-132-5093-76f04-1.html
third-party-advisory
Sources
- CVE List CVE-2021-37909
- NVD CVE-2021-37909
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