CVE-2021-21790
MEDIUMDescription
An information disclosure vulnerability exists in the the way IOBit Advanced SystemCare Ultimate 14.2.0.220 driver handles Privileged I/O read requests. A specially crafted I/O request packet (IRP) can lead to privileged reads in the context of a driver which can result in sensitive information disclosure from the kernel. The IN instruction can read two bytes from the given I/O device, potentially leaking sensitive device data to unprivileged users.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 26% of all known CVEs.
References
Related Vulnerabilities
Other CWE-782 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2021-21551 | High | 8.8 | 53% | KEV | - |
| CVE-2025-7771 | Unscored | - | 6.8% | - | - |
| CVE-2024-32370 | Critical | 9.8 | 1.0% | - | Fix |
| CVE-2024-30804 | Critical | 9.8 | 0.8% | - | - |
| CVE-2024-39251 | Critical | 10.0 | 0.7% | - | - |
| CVE-2024-33220 | High | 8.8 | 0.7% | - | - |
Common questions
How do I fix CVE-2021-21790?
No published fix for CVE-2021-21790 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2021-21790 being actively exploited?
Not that we know of. CVE-2021-21790 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.34% is the estimated probability that it will be exploited in the next 30 days. That is higher than 26% of all scored CVEs.
How severe is CVE-2021-21790?
CVE-2021-21790 has a CVSS v3 base score of 5.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.