How severe is CVE-2021-26380?

CVE-2021-26380 has a CVSS 4.0 base score of 1.8, rated low severity.

Is CVE-2021-26380 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2021-26380?

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

Does CVE-2021-26380 have an EU (EUVD) identifier?

Yes. CVE-2021-26380 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-13186.

When was CVE-2021-26380 published?

CVE-2021-26380 was published on 2026-05-15 and last updated on 2026-06-17.

CVE-2021-26380

CVE-2021-26380 is a low-severity vulnerability with a CVSS 4.0 base score of 1.8. 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-190.

Key facts

Severity: Low (CVSS 4.0 base score 1.8)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2021-13186
Weakness: CWE-190
Published: 2026-05-15
Last modified: 2026-06-17

Description

A compromised Trusted OS (TOS) driver could issue a malformed call that could potentially allow memory access outside the intended range resulting in loss of integrity.

Frequently asked questions

What is CVE-2021-26380?: A compromised Trusted OS (TOS) driver could issue a malformed call that could potentially allow memory access outside the intended range resulting in loss of integrity.
How severe is CVE-2021-26380?: CVE-2021-26380 has a CVSS 4.0 base score of 1.8, rated low severity.
Is CVE-2021-26380 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2021-26380?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2021-26380 have an EU (EUVD) identifier?: Yes. CVE-2021-26380 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-13186.
When was CVE-2021-26380 published?: CVE-2021-26380 was published on 2026-05-15 and last updated on 2026-06-17.

References

Other CWE-190 (Integer Overflow or Wraparound) vulnerabilities

CVE-2026-4689 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability was…
CVE-2026-24814 — Critical (CVSS 10.0): Integer Overflow or Wraparound vulnerability in swoole swoole-src (thirdparty/hiredis modules). This vulnerability is…
CVE-2025-64721 — Critical (CVSS 10.0): Sandboxie is a sandbox-based isolation software for 32-bit and 64-bit Windows NT-based operating systems. In versions…
CVE-2015-5108 — Critical (CVSS 10.0): Integer overflow in Adobe Reader and Acrobat 10.x before 10.1.15 and 11.x before 11.0.12, Acrobat and Acrobat Reader DC…
CVE-2015-5097 — Critical (CVSS 10.0): Integer overflow in Adobe Reader and Acrobat 10.x before 10.1.15 and 11.x before 11.0.12, Acrobat and Acrobat Reader DC…
CVE-2013-2555 — Critical (CVSS 10.0): Integer overflow in Adobe Flash Player before 10.3.183.75 and 11.x before 11.7.700.169 on Windows and Mac OS X, before…

Browse all CWE-190 (Integer Overflow or Wraparound) vulnerabilities →