How severe is CVE-2019-18631?

CVE-2019-18631 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-18631 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-18631?

CVE-2019-18631 primarily affects Centrify Authentication Service. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-18631?

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-2019-18631 published?

CVE-2019-18631 was published on 2019-11-05 and last updated on 2026-06-17.

CVE-2019-18631

CVE-2019-18631 is a high-severity vulnerability in Centrify Authentication Service 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-502.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 5.1
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Centrify Authentication Service
Published: 2019-11-05
Last modified: 2026-06-17

Description

The Windows component of Centrify Authentication and Privilege Elevation Services 3.4.0, 3.4.1, 3.4.2, 3.4.3, 3.5.0, 3.5.1 (18.8), 3.5.2 (18.11), and 3.6.0 (19.6) does not properly handle an unspecified exception during use of partially trusted assemblies to serialize input data, which allows attackers to execute arbitrary code inside the Centrify process via (1) a crafted application that makes a pipe connection to the process and sends malicious serialized data or (2) a crafted Microsoft Management Console snap-in control file.

Frequently asked questions

What is CVE-2019-18631?: The Windows component of Centrify Authentication and Privilege Elevation Services 3.4.0, 3.4.1, 3.4.2, 3.4.3, 3.5.0, 3.5.1 (18.8), 3.5.2 (18.11), and 3.6.0 (19.6) does not properly handle an unspecified exception during use of partially trusted assemblies to serialize input data, which allows attackers to execute arbitrary code inside the Centrify process via (1) a crafted application that makes a pipe connection to the process and sends malicious serialized data or (2) a crafted Microsoft Management Console snap-in control file.
How severe is CVE-2019-18631?: CVE-2019-18631 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-18631 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-18631?: CVE-2019-18631 primarily affects Centrify Authentication Service. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-18631?: 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-2019-18631 published?: CVE-2019-18631 was published on 2019-11-05 and last updated on 2026-06-17.

References

https://centrify.force.com/support/Article/KB-22420-Centrify-Agent-for-Windows-Remote-Code-Execution-Vulnerability

Affected products (16)

cpe:2.3:a:centrify:authentication_service:3.4.0:*:*:*:*:windows:*:*
cpe:2.3:a:centrify:authentication_service:3.4.1:*:*:*:*:windows:*:*
cpe:2.3:a:centrify:authentication_service:3.4.2:*:*:*:*:windows:*:*
cpe:2.3:a:centrify:authentication_service:3.4.3:*:*:*:*:windows:*:*
cpe:2.3:a:centrify:authentication_service:3.5.0:*:*:*:*:windows:*:*
cpe:2.3:a:centrify:authentication_service:3.5.1:*:*:*:*:windows:*:*
cpe:2.3:a:centrify:authentication_service:3.5.2:*:*:*:*:windows:*:*
cpe:2.3:a:centrify:authentication_service:3.6.0:*:*:*:*:windows:*:*
cpe:2.3:a:centrify:privilege_elevation_service:3.4.0:*:*:*:*:windows:*:*
cpe:2.3:a:centrify:privilege_elevation_service:3.4.1:*:*:*:*:windows:*:*
cpe:2.3:a:centrify:privilege_elevation_service:3.4.2:*:*:*:*:windows:*:*
cpe:2.3:a:centrify:privilege_elevation_service:3.4.3:*:*:*:*:windows:*:*
cpe:2.3:a:centrify:privilege_elevation_service:3.5.0:*:*:*:*:windows:*:*
cpe:2.3:a:centrify:privilege_elevation_service:3.5.1:*:*:*:*:windows:*:*
cpe:2.3:a:centrify:privilege_elevation_service:3.5.2:*:*:*:*:windows:*:*
cpe:2.3:a:centrify:privilege_elevation_service:3.6.0:*:*:*:*:windows:*:*

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