How severe is CVE-2021-45091?

CVE-2021-45091 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2021-45091 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45091?

CVE-2021-45091 primarily affects Stormshield Endpoint Security. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-45091?

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

When was CVE-2021-45091 published?

CVE-2021-45091 was published on 2021-12-21 and last updated on 2026-06-17.

CVE-2021-45091

CVE-2021-45091 is a medium-severity vulnerability in Stormshield Endpoint Security with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Stormshield Endpoint Security
Published: 2021-12-21
Last modified: 2026-06-17

Description

Stormshield Endpoint Security from 2.1.0 to 2.1.1 has Incorrect Access Control.

Frequently asked questions

What is CVE-2021-45091?: Stormshield Endpoint Security from 2.1.0 to 2.1.1 has Incorrect Access Control.
How severe is CVE-2021-45091?: CVE-2021-45091 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2021-45091 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45091?: CVE-2021-45091 primarily affects Stormshield Endpoint Security. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-45091?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-45091 published?: CVE-2021-45091 was published on 2021-12-21 and last updated on 2026-06-17.

References

https://advisories.stormshield.eu/2021-072/

Affected products (2)

cpe:2.3:a:stormshield:endpoint_security:2.1.0:*:*:*:*:*:*:*
cpe:2.3:a:stormshield:endpoint_security:2.1.1:*:*:*:*:*:*:*

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