How severe is CVE-2018-3657?

CVE-2018-3657 has a CVSS 3.x base score of 6.7, rated medium 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-2018-3657 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-3657?

CVE-2018-3657 primarily affects Intel Converged Security Management Engine Firmware. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-3657?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-3657 published?

CVE-2018-3657 was published on 2018-09-12 and last updated on 2026-06-17.

CVE-2018-3657

CVE-2018-3657 is a medium-severity vulnerability in Intel Converged Security Management Engine Firmware with a CVSS 3.x base score of 6.7. 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-119.

Key facts

Severity: Medium (CVSS 3.x base score 6.7)
CVSS v2: 7.2
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Intel Converged Security Management Engine Firmware
Published: 2018-09-12
Last modified: 2026-06-17

Description

Multiple buffer overflows in Intel AMT in Intel CSME firmware versions before version 12.0.5 may allow a privileged user to potentially execute arbitrary code with Intel AMT execution privilege via local access.

Frequently asked questions

What is CVE-2018-3657?: Multiple buffer overflows in Intel AMT in Intel CSME firmware versions before version 12.0.5 may allow a privileged user to potentially execute arbitrary code with Intel AMT execution privilege via local access.
How severe is CVE-2018-3657?: CVE-2018-3657 has a CVSS 3.x base score of 6.7, rated medium 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-2018-3657 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-3657?: CVE-2018-3657 primarily affects Intel Converged Security Management Engine Firmware. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-3657?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-3657 published?: CVE-2018-3657 was published on 2018-09-12 and last updated on 2026-06-17.

References

Affected products (14)

cpe:2.3:o:siemens:simatic_field_pg_m5_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_ipc427e_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_ipc477e_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_ipc547e_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_pc547g_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_ipc627d_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_ipc647d_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_ipc677d_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_ipc827d_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_ipc847d_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_itp1000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:a:intel:converged_security_management_engine_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:active_management_technology_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:manageability_engine_firmware:*:*:*:*:*:*:*:*

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