How severe is CVE-2020-28921?

CVE-2020-28921 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-28921 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-28921?

CVE-2020-28921 affects Pcanalyser Pc Analyser. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-28921?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-28921 published?

CVE-2020-28921 was published on 2020-11-27 and last updated on 2026-06-17.

CVE-2020-28921

CVE-2020-28921 is a high-severity vulnerability in Pcanalyser Pc Analyser with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 7.2
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Pcanalyser Pc Analyser
Published: 2020-11-27
Last modified: 2026-06-17

Description

An issue was discovered in Devid Espenschied PC Analyser through 4.10. The PCADRVX64.SYS kernel driver exposes IOCTL functionality that allows low-privilege users to read and write to arbitrary Model Specific Registers (MSRs). This could lead to arbitrary Ring-0 code execution and escalation of privileges.

Frequently asked questions

What is CVE-2020-28921?: An issue was discovered in Devid Espenschied PC Analyser through 4.10. The PCADRVX64.SYS kernel driver exposes IOCTL functionality that allows low-privilege users to read and write to arbitrary Model Specific Registers (MSRs). This could lead to arbitrary Ring-0 code execution and escalation of privileges.
How severe is CVE-2020-28921?: CVE-2020-28921 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-28921 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-28921?: CVE-2020-28921 affects Pcanalyser Pc Analyser. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-28921?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-28921 published?: CVE-2020-28921 was published on 2020-11-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:pcanalyser:pc_analyser:*:*:*:*:*:*:*:*

More vulnerabilities in Pcanalyser Pc Analyser

CVE-2020-28922 — High (CVSS 8.8): An issue was discovered in Devid Espenschied PC Analyser through 4.10. The PCADRVX64.SYS kernel driver exposes IOCTL…

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