How severe is CVE-2021-23887?

CVE-2021-23887 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-23887 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23887?

CVE-2021-23887 affects Mcafee Data Loss Prevention Endpoint. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-23887?

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-2021-23887 published?

CVE-2021-23887 was published on 2021-04-15 and last updated on 2026-06-17.

CVE-2021-23887

CVE-2021-23887 is a high-severity vulnerability in Mcafee Data Loss Prevention Endpoint 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-269.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-269
Affected product: Mcafee Data Loss Prevention Endpoint
Published: 2021-04-15
Last modified: 2026-06-17

Description

Privilege Escalation vulnerability in McAfee Data Loss Prevention (DLP) Endpoint for Windows prior to 11.6.100 allows a local, low privileged, attacker to write to arbitrary controlled kernel addresses. This is achieved by launching applications, suspending them, modifying the memory and restarting them when they are monitored by McAfee DLP through the hdlphook driver.

Frequently asked questions

What is CVE-2021-23887?: Privilege Escalation vulnerability in McAfee Data Loss Prevention (DLP) Endpoint for Windows prior to 11.6.100 allows a local, low privileged, attacker to write to arbitrary controlled kernel addresses. This is achieved by launching applications, suspending them, modifying the memory and restarting them when they are monitored by McAfee DLP through the hdlphook driver.
How severe is CVE-2021-23887?: CVE-2021-23887 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-23887 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23887?: CVE-2021-23887 affects Mcafee Data Loss Prevention Endpoint. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23887?: 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-2021-23887 published?: CVE-2021-23887 was published on 2021-04-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mcafee:data_loss_prevention_endpoint:*:*:*:*:*:windows:*:*

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