How severe is CVE-2026-40030?

CVE-2026-40030 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-40030 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40030?

CVE-2026-40030 affects Khyrenz Parseusbs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40030?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-40030 have an EU (EUVD) identifier?

Yes. CVE-2026-40030 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20771.

When was CVE-2026-40030 published?

CVE-2026-40030 was published on 2026-04-08 and last updated on 2026-06-17.

CVE-2026-40030

CVE-2026-40030 is a high-severity vulnerability in Khyrenz Parseusbs with a CVSS 3.x base score of 7.8. 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-78.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v4: 8.4
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20771
Weakness: CWE-78
Affected product: Khyrenz Parseusbs
Published: 2026-04-08
Last modified: 2026-06-17

Description

parseusbs before 1.9 contains an OS command injection vulnerability where the volume listing path argument (-v flag) is passed unsanitized into an os.popen() shell command with ls, allowing arbitrary command injection via crafted volume path arguments containing shell metacharacters. An attacker can provide a crafted volume path via the -v flag that injects arbitrary commands during volume content enumeration.

Frequently asked questions

What is CVE-2026-40030?: parseusbs before 1.9 contains an OS command injection vulnerability where the volume listing path argument (-v flag) is passed unsanitized into an os.popen() shell command with ls, allowing arbitrary command injection via crafted volume path arguments containing shell metacharacters. An attacker can provide a crafted volume path via the -v flag that injects arbitrary commands during volume content enumeration.
How severe is CVE-2026-40030?: CVE-2026-40030 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-40030 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40030?: CVE-2026-40030 affects Khyrenz Parseusbs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40030?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-40030 have an EU (EUVD) identifier?: Yes. CVE-2026-40030 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20771.
When was CVE-2026-40030 published?: CVE-2026-40030 was published on 2026-04-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:khyrenz:parseusbs:*:*:*:*:*:*:*:*

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