How severe is CVE-2018-3643?

CVE-2018-3643 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-3643 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-3643?

CVE-2018-3643 primarily affects Intel Converged Security Management Engine Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-3643?

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-2018-3643 published?

CVE-2018-3643 was published on 2018-09-12 and last updated on 2026-06-17.

CVE-2018-3643

CVE-2018-3643 is a high-severity vulnerability in Intel Converged Security Management Engine Firmware with a CVSS 3.x base score of 8.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.2)
CVSS v2: 4.6
EPSS exploit prediction: 1% (39th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Intel Converged Security Management Engine Firmware
Published: 2018-09-12
Last modified: 2026-06-17

Description

A vulnerability in Power Management Controller firmware in systems using specific Intel(R) Converged Security and Management Engine (CSME) before version 11.8.55, 11.11.55, 11.21.55, 12.0.6 or Intel(R) Server Platform Services firmware before version 4.x.04 may allow an attacker with administrative privileges to uncover certain platform secrets via local access or to potentially execute arbitrary code.

Frequently asked questions

What is CVE-2018-3643?: A vulnerability in Power Management Controller firmware in systems using specific Intel(R) Converged Security and Management Engine (CSME) before version 11.8.55, 11.11.55, 11.21.55, 12.0.6 or Intel(R) Server Platform Services firmware before version 4.x.04 may allow an attacker with administrative privileges to uncover certain platform secrets via local access or to potentially execute arbitrary code.
How severe is CVE-2018-3643?: CVE-2018-3643 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-3643 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-3643?: CVE-2018-3643 primarily affects Intel Converged Security Management Engine Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-3643?: 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-2018-3643 published?: CVE-2018-3643 was published on 2018-09-12 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:intel:converged_security_management_engine_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:server_platform_services_firmware:*:*:*:*:*:*:*:*

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