CVE-2021-37909
CRITICALCVSS 9.8/10EPSS 1.94%
Last modified
CVE-2021-37909 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 1.94% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Tssservisignadapter Project | Tssservisignadapter | <= 1.0.20.0316 |
References
- https://www.twcert.org.tw/tw/cp-132-5093-76f04-1.htmlThird Party Advisory
- https://www.twcert.org.tw/tw/cp-132-5093-76f04-1.htmlThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-37909?
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.
How severe is CVE-2021-37909?
CVE-2021-37909 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.94% probability of exploitation in the next 30 days.
How do I fix CVE-2021-37909?
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-37909?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST