How severe is CVE-2018-16091?

CVE-2018-16091 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-16091 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-16091?

CVE-2018-16091 affects Lenovo System Management Module Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-16091?

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-2018-16091 published?

CVE-2018-16091 was published on 2018-11-27 and last updated on 2026-06-17.

CVE-2018-16091

CVE-2018-16091 is a high-severity vulnerability in Lenovo System Management Module Firmware with a CVSS 3.x base score of 8.1. 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: High (CVSS 3.x base score 8.1)
CVSS v2: 6.8
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Lenovo System Management Module Firmware
Published: 2018-11-27
Last modified: 2026-06-17

Description

In System Management Module (SMM) versions prior to 1.06, the SMM certificate creation and parsing logic is vulnerable to several buffer overflows.

Frequently asked questions

What is CVE-2018-16091?: In System Management Module (SMM) versions prior to 1.06, the SMM certificate creation and parsing logic is vulnerable to several buffer overflows.
How severe is CVE-2018-16091?: CVE-2018-16091 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-16091 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-16091?: CVE-2018-16091 affects Lenovo System Management Module Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-16091?: 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-2018-16091 published?: CVE-2018-16091 was published on 2018-11-27 and last updated on 2026-06-17.

References

https://support.lenovo.com/us/en/solutions/LEN-24374

Affected products (1)

cpe:2.3:o:lenovo:system_management_module_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Lenovo System Management Module Firmware

CVE-2018-9083 — High (CVSS 8.1): In System Management Module (SMM) versions prior to 1.06, the SMM contains weak default root credentials which could be…
CVE-2018-16094 — High (CVSS 8.1): In System Management Module (SMM) versions prior to 1.06, an internal SMM function that retrieves configuration…
CVE-2018-16092 — High (CVSS 8.1): In System Management Module (SMM) versions prior to 1.06, the FFDC feature includes the collection of SMM system files…
CVE-2018-16090 — High (CVSS 7.5): In System Management Module (SMM) versions prior to 1.06, the SMM certificate creation and parsing logic is vulnerable…
CVE-2018-16089 — High (CVSS 7.5): In System Management Module (SMM) versions prior to 1.06, a field in the header of SMM firmware update images is…
CVE-2018-9084 — Medium (CVSS 6.5): In System Management Module (SMM) versions prior to 1.06, if an attacker manages to log in to the device OS, the…

All CVEs affecting Lenovo System Management Module Firmware →

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

CVE-2026-2778 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in…
CVE-2026-2776 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability…
CVE-2025-1866 — Critical (CVSS 10.0): Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows…
CVE-2022-27625 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2022-27624 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2020-11896 — Critical (CVSS 10.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →