How severe is CVE-2021-3394?

CVE-2021-3394 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-3394 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3394?

CVE-2021-3394 primarily affects Millewin. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-3394?

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.

When was CVE-2021-3394 published?

CVE-2021-3394 was published on 2021-02-09 and last updated on 2026-06-17.

CVE-2021-3394

CVE-2021-3394 is a high-severity vulnerability in Millewin with a CVSS 3.x base score of 8.8. 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-276.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-276
Affected product: Millewin
Published: 2021-02-09
Last modified: 2026-06-17

Description

Millennium Millewin (also known as "Cartella clinica") 13.39.028, 13.39.28.3342, and 13.39.146.1 has insecure folder permissions allowing a malicious user for a local privilege escalation.

Frequently asked questions

What is CVE-2021-3394?: Millennium Millewin (also known as "Cartella clinica") 13.39.028, 13.39.28.3342, and 13.39.146.1 has insecure folder permissions allowing a malicious user for a local privilege escalation.
How severe is CVE-2021-3394?: CVE-2021-3394 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-3394 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3394?: CVE-2021-3394 primarily affects Millewin. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-3394?: 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.
When was CVE-2021-3394 published?: CVE-2021-3394 was published on 2021-02-09 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:millewin:millewin:13.39.028:*:*:*:*:*:*:*
cpe:2.3:a:millewin:millewin:13.39.28.3342:*:*:*:*:*:*:*
cpe:2.3:a:millewin:millewin:13.39.146.1:*:*:*:*:*:*:*

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