Cyber Resilience

CVE-2026-21733

High

Published: 17 April 2026

Published
17 April 2026
Modified
10 May 2026
KEV Added
—
Patch
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CVSS Score v3.1 7.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
EPSS Score 0.0003 7.5th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-21733 is a high-severity Improper Input Validation (CWE-20) vulnerability in Imaginationtech (inferred from references). Its CVSS base score is 7.3 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 7.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-2 (Flaw Remediation) and AC-6 (Least Privilege).

Deeper analysis

CVE-2026-21733 is a vulnerability affecting the Imagination Technologies Graphics DDK on Linux and Android platforms. Published on 2026-04-17T17:16:35.220, it has a CVSS v3.1 base score of 7.3 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L), indicating high severity with local attack vector, low attack complexity, and low privileges required.

A local attacker with low privileges can exploit this vulnerability without user interaction. Successful exploitation enables high-impact confidentiality and integrity violations, alongside low availability impact, potentially allowing unauthorized data access or modification within the affected graphics driver context.

Mitigation details are available in the vendor advisory at https://www.imaginationtech.com/gpu-driver-vulnerabilities/.

EU & UK References

Vulnerability details

Vulnerability in Imagination Technologies Graphics DDK on Linux, Android --  RESERVED

CWE(s)
CWE-20

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
Why these techniques?

Local low-privilege exploit in graphics driver with high C/I impact directly enables privilege escalation via kernel/driver code execution.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

CVEs Like This One

CVE-2025-21234Shared CWE-20
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CVE-2025-25210Shared CWE-20
CVE-2026-7905Shared CWE-20
CVE-2026-7997Shared CWE-20
CVE-2026-5174Shared CWE-20
CVE-2026-26170Shared CWE-20
CVE-2026-9914Shared CWE-20
CVE-2025-24255Shared CWE-20
CVE-2026-9885Shared CWE-20

Affected Assets

Imaginationtech
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inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-2 Flaw Remediation good match
prevent

Directly mandates timely identification, reporting, and remediation of the graphics DDK vulnerability via patching as specified in the vendor advisory.

AC-6 Least Privilege partial match
prevent

Enforces least privilege to restrict low-privilege (PR:L) local user access to vulnerable graphics driver interfaces and resources.

CM-6 Configuration Settings partial match
prevent

Requires secure configuration settings for the Imagination Technologies Graphics DDK to mitigate exploitation of the local vulnerability.

References