CVE-2026-21733

Q: Is CVE-2026-21733 being actively exploited?

Not that we know of. CVE-2026-21733 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.10% is the estimated probability that it will be exploited in the next 30 days. That is higher than 1% of all scored CVEs.

Q: How severe is CVE-2026-21733?

CVE-2026-21733 has a CVSS v3 base score of 7.3, rated high. 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.

Q: What does CVE-2026-21733 affect?

Published advisories record a fix for ddk (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

HIGH

7.3

CVSS v3

NVD

Description

Software installed and run as a non-privileged user may conduct improper GPU system calls to gain write permission to read-only wrapped user-mode memory and files. This is caused by improper handling of GPU memory reservation protections.

CWE-280Improper Handling of Insufficient Permissions CWE-20Improper Input Validation

How to fix

Remediation Available

ddkNVD

Affected:< 25.3Fixed in:25.3CVE-2026-21733derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityLow

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Exploit Intelligence

0.10%probability of exploitation in 30 days

1stpercentile

Low risk: more likely to be exploited than 1% of all known CVEs.

References

Vendor Advisory1

imaginationtech.com

Related Vulnerabilities

Other CWE-280 (Improper Handling of Insufficient Permissions) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-24116	Critical	9.8	28%	-	-
CVE-2026-20817	High	7.8	5.4%	-	Fix
CVE-2020-8219	High	7.2	2.2%	-	-
CVE-2012-4550	Medium	5.3	2.1%	-	-
CVE-2020-26195	Medium	5.3	1.8%	-	-
CVE-2021-38312	High	7.1	1.3%	-	-

Common questions

How do I fix CVE-2026-21733?

Upgrade ddk to 25.3 or later.

Is CVE-2026-21733 being actively exploited?

Not that we know of. CVE-2026-21733 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.10% is the estimated probability that it will be exploited in the next 30 days. That is higher than 1% of all scored CVEs.

How severe is CVE-2026-21733?

CVE-2026-21733 has a CVSS v3 base score of 7.3, rated high. 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.

What does CVE-2026-21733 affect?

Published advisories record a fix for ddk (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-21733

Markdown

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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 2026-08-12.