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CVE-2015-5684

31
FAUCET Score

CVE-2015-5684 describes a critical buffer overflow vulnerability in the Lenovo Service Engine (LSE) within the BIOS of various Lenovo Notebooks. This flaw, assigned a CVSS score of 9.8, allows an unauthenticated remote attacker to execute arbitrary code with high impact on confidentiality, integrity, and availability. Although fixed and publicly disclosed in 2015, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant media coverage. However, the vulnerability has garnered notable community discussion, indicating awareness despite the lack of readily available exploits.

Impacted Technologies

VendorProductVersion(s)CPE
< cccn13ww\(v1.02\)CPE matchmatch criteria
cpe:2.3:o:lenovo:b50-10_firmware:*:*:*:*:*:*:*:*
< a9cn46wwCPE matchmatch criteria
cpe:2.3:o:lenovo:flex_2_pro-15_firmware:*:*:*:*:*:*:*:*
< a9cn46wwCPE matchmatch criteria
cpe:2.3:o:lenovo:edge_15_firmware:*:*:*:*:*:*:*:*
< b9cn17wwCPE matchmatch criteria
cpe:2.3:o:lenovo:edge_15_firmware:*:*:*:*:*:*:*:*
< b9cn17wwCPE matchmatch criteria
cpe:2.3:o:lenovo:flex_2_pro-15_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.69%
Probability of exploitation in next 30 days
EPSS Percentile
88.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0369 is in the 81st percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

support.lenovo.com / us/en/product_security/lse_bios_notebook
Vendor Advisory