How severe is CVE-2015-5684?

CVE-2015-5684 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2015-5684 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-5684?

CVE-2015-5684 primarily affects Lenovo B50-10 Firmware. In total, 27 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-5684?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2015-5684 published?

CVE-2015-5684 was published on 2020-03-27 and last updated on 2026-06-17.

CVE-2015-5684

CVE-2015-5684 is a critical-severity vulnerability in Lenovo B50-10 Firmware with a CVSS 3.x base score of 9.8. 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-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Lenovo B50-10 Firmware
Published: 2020-03-27
Last modified: 2026-06-17

Description

MITRE is populating this ID because it was assigned prior to Lenovo becoming a CNA. A buffer overflow vulnerability was reported, (fixed and publicly disclosed in 2015) in the Lenovo Service Engine (LSE), affecting various versions of BIOS for Lenovo Notebooks, that could allow a remote user to execute arbitrary code on the system.

Frequently asked questions

What is CVE-2015-5684?: MITRE is populating this ID because it was assigned prior to Lenovo becoming a CNA. A buffer overflow vulnerability was reported, (fixed and publicly disclosed in 2015) in the Lenovo Service Engine (LSE), affecting various versions of BIOS for Lenovo Notebooks, that could allow a remote user to execute arbitrary code on the system.
How severe is CVE-2015-5684?: CVE-2015-5684 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2015-5684 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-5684?: CVE-2015-5684 primarily affects Lenovo B50-10 Firmware. In total, 27 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-5684?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2015-5684 published?: CVE-2015-5684 was published on 2020-03-27 and last updated on 2026-06-17.

References

https://support.lenovo.com/us/en/product_security/lse_bios_notebook

Affected products (27)

cpe:2.3:o:lenovo:b50-10_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:flex_2_pro-15_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:edge_15_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:flex_3-1470_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:flex_3-1570_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:flex_3-1120_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:g40-80_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:g50-80_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:g50-80_touch_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:g50-80_touch_v3000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:g40-80m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:g50-80m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:ideapad_100-14iby_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:ideapad_100-15iby_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:s21e_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:s41-70_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:u41-70_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:s435_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:m40-35_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:u31-70_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:yoga_3_14_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:yoga_3_11_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:y40-80_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:z41-70_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:z51-70_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:z70-80_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:g70-80_firmware:*:*:*:*:*:*:*:*

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