How severe is CVE-2026-32603?

CVE-2026-32603 has a CVSS 3.x base score of 6.5, 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-2026-32603 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-32603?

CVE-2026-32603 affects Sandboxie-plus Sandboxie. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-32603?

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

Does CVE-2026-32603 have an EU (EUVD) identifier?

Yes. CVE-2026-32603 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27436.

When was CVE-2026-32603 published?

CVE-2026-32603 was published on 2026-05-05 and last updated on 2026-06-17.

CVE-2026-32603

CVE-2026-32603 is a medium-severity vulnerability in Sandboxie-plus Sandboxie with a CVSS 3.x base score of 6.5. 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 8.2
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-27436
Weakness: CWE-20
Affected product: Sandboxie-plus Sandboxie
Published: 2026-05-05
Last modified: 2026-06-17

Description

Sandboxie is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, a local denial of service vulnerability exists in the Sandboxie kernel driver. An unprivileged process running inside a Standard Sandbox can send a malformed IOCTL to the \Device\SandboxieDriverApi driver, triggering an immediate kernel crash (BSOD). The vulnerability affects the Standard Sandbox configuration both with and without dropped administrator privileges, but does not affect the Security Hardened Sandbox configuration. This issue has been fixed in version 1.17.3. Users who cannot update can use the Security Hardened Sandbox configuration as a workaround.

Frequently asked questions

What is CVE-2026-32603?: Sandboxie is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, a local denial of service vulnerability exists in the Sandboxie kernel driver. An unprivileged process running inside a Standard Sandbox can send a malformed IOCTL to the \Device\SandboxieDriverApi driver, triggering an immediate kernel crash (BSOD). The vulnerability affects the Standard Sandbox configuration both with and without dropped administrator privileges, but does not affect the Security Hardened Sandbox configuration. This issue has been fixed in version 1.17.3. Users who cannot update can use the Security Hardened Sandbox configuration as a workaround.
How severe is CVE-2026-32603?: CVE-2026-32603 has a CVSS 3.x base score of 6.5, 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-2026-32603 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-32603?: CVE-2026-32603 affects Sandboxie-plus Sandboxie. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-32603?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-32603 have an EU (EUVD) identifier?: Yes. CVE-2026-32603 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27436.
When was CVE-2026-32603 published?: CVE-2026-32603 was published on 2026-05-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:sandboxie-plus:sandboxie:*:*:*:*:plus:*:*:*

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