How severe is CVE-2021-27203?

CVE-2021-27203 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-27203 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27203?

CVE-2021-27203 affects Dekart Private Disk. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27203?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-27203 published?

CVE-2021-27203 was published on 2021-02-16 and last updated on 2026-06-17.

CVE-2021-27203

CVE-2021-27203 is a medium-severity vulnerability in Dekart Private Disk with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.9
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Dekart Private Disk
Published: 2021-02-16
Last modified: 2026-06-17

Description

In Dekart Private Disk 2.15, invalid use of the Type3 user buffer for IOCTL codes using METHOD_NEITHER results in arbitrary memory dereferencing.

Frequently asked questions

What is CVE-2021-27203?: In Dekart Private Disk 2.15, invalid use of the Type3 user buffer for IOCTL codes using METHOD_NEITHER results in arbitrary memory dereferencing.
How severe is CVE-2021-27203?: CVE-2021-27203 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-27203 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27203?: CVE-2021-27203 affects Dekart Private Disk. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27203?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-27203 published?: CVE-2021-27203 was published on 2021-02-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:dekart:private_disk:2.15:*:*:*:*:*:*:*

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