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CVE-2015-5914

15
FAUCET Score

CVE-2015-5914 describes a "Thunderstrike" vulnerability in Apple OS X before version 10.11, allowing physically proximate attackers to modify EFI firmware during updates. This is achieved by inserting an Apple Ethernet Thunderbolt adapter containing crafted code in its Option ROM, leveraging an incomplete fix for a previous vulnerability. With a CVSS score of 4.7 (AV:L/AC:M/Au:N/C:N/I:C/A:N), it requires physical access and moderate attack complexity to achieve a complete integrity impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 10.10.5CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.7MEDIUM

AV:L/AC:M/Au:N/C:N/I:C/A:N

Confidentiality Impact
NONE
Integrity Impact
COMPLETE
Availability Impact
NONE
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
3.4
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.35%
Probability of exploitation in next 30 days
EPSS Percentile
27.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0035 is in the 36th percentile among its peer group of 1,595 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Vendor Patches (1)

applevendor investigatingvia nvd_reference
View patch

References

lists.apple.com / archives/security-announce/2015/Sep/msg00008.html
Vendor Advisory
support.apple.com / HT205267
Vendor Advisory
trmm.net / Thunderstrike_FAQ
securitytracker.com / id/1033703