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01 Record

CVE-2021-37909

CHANGING Inc. TSSServiSignAdapter Windows Versions - Improper Input Validation

CriticalPUBLISHEDCNA: twcert
CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

02 Description

CHANGING Inc. TSSServiSignAdapter Windows Versions - Improper Input Validation

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
2.00% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 80.6% of scored records. A rank, not a probability.
NVD base score
9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-09-15 19:10Z5 YR AGO
Last updated
2024-09-17 00:42Z2 YR AGO
Reserved
2021-08-02
Assigning CNA
twcert
Record state
PUBLISHED
Severity
Critical (CVSS 9.8)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
  • CWE-20Improper Input ValidationClass
Data version
5.1
Document digest
d8a31f5cd7f17743b49ebc0d852f55a7069b35e6ee6b0e552d3433ae24ab0790

05 Affected products

VendorProductVersionsPlatforms
CHANGING Inc.TSSServiSignAdapter<= 1.0.20.0316Windows

06 References

07 Remediation

Update to version 1.0.21.0520