How severe is CVE-2021-45090?

CVE-2021-45090 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-45090 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45090?

CVE-2021-45090 affects Stormshield Endpoint Security. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-45090?

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

When was CVE-2021-45090 published?

CVE-2021-45090 was published on 2021-12-21 and last updated on 2026-06-17.

CVE-2021-45090

CVE-2021-45090 is a critical-severity vulnerability in Stormshield Endpoint Security with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 3% (85th 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 before 2.1.2 allows remote code execution.

Frequently asked questions

What is CVE-2021-45090?: Stormshield Endpoint Security before 2.1.2 allows remote code execution.
How severe is CVE-2021-45090?: CVE-2021-45090 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-45090 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45090?: CVE-2021-45090 affects Stormshield Endpoint Security. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-45090?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-45090 published?: CVE-2021-45090 was published on 2021-12-21 and last updated on 2026-06-17.

References

https://advisories.stormshield.eu/2021-070/

Affected products (1)

cpe:2.3:a:stormshield:endpoint_security:*:*:*:*:*:*:*:*

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