How severe is CVE-2021-3187?

CVE-2021-3187 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-2021-3187 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3187?

CVE-2021-3187 affects Beyondtrust Privilege Management For Mac. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3187?

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-2021-3187 published?

CVE-2021-3187 was published on 2023-12-11 and last updated on 2026-06-17.

CVE-2021-3187

CVE-2021-3187 is a high-severity vulnerability in Beyondtrust Privilege Management For Mac 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)
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-276
Affected product: Beyondtrust Privilege Management For Mac
Published: 2023-12-11
Last modified: 2026-06-17

Description

An issue was discovered in BeyondTrust Privilege Management for Mac before 5.7. An authenticated, unprivileged user can elevate privileges by running a malicious script (that executes as root from a temporary directory) during install time. (This applies to macOS before 10.15.5, or Security Update 2020-003 on Mojave and High Sierra, Later versions of macOS are not vulnerable.)

Frequently asked questions

What is CVE-2021-3187?: An issue was discovered in BeyondTrust Privilege Management for Mac before 5.7. An authenticated, unprivileged user can elevate privileges by running a malicious script (that executes as root from a temporary directory) during install time. (This applies to macOS before 10.15.5, or Security Update 2020-003 on Mojave and High Sierra, Later versions of macOS are not vulnerable.)
How severe is CVE-2021-3187?: CVE-2021-3187 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-2021-3187 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3187?: CVE-2021-3187 affects Beyondtrust Privilege Management For Mac. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3187?: 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-2021-3187 published?: CVE-2021-3187 was published on 2023-12-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:beyondtrust:privilege_management_for_mac:*:*:*:*:*:*:*:*

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