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CVE-2018-10404

22
FAUCET Score

CVE-2018-10404 describes a vulnerability in multiple Objective-See security tools, including KnockKnock, LuLu, and WhatsYourSign. A maliciously crafted Universal/fat binary can bypass third-party code signing checks, leading users to believe unsigned, malicious code is legitimately signed by Apple. This high-severity vulnerability (CVSS 7.8) has a low attack complexity, requiring user interaction, and could lead to complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), it has received some community discussion and media coverage, indicating awareness within the security community.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.9.3CPE matchmatch criteria
cpe:2.3:a:objective-see:knockknock:*:*:*:*:*:*:*:*
<= 0.9.8CPE matchmatch criteria
cpe:2.3:a:objective-see:lulu:*:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:objective-see:procinfo:-:*:*:*:*:*:*:*
<= 1.6.0CPE matchmatch criteria
cpe:2.3:a:objective-see:taskexplorer:*:*:*:*:*:*:*:*
<= 1.4.0CPE matchmatch criteria
cpe:2.3:a:objective-see:whatsyoursign:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.86%
Probability of exploitation in next 30 days
EPSS Percentile
54.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0086 is in the 51st percentile among its peer group of 11,615 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

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

okta.com / security-blog/2018/06/issues-around-third-party-apple-code-signing-checks
ExploitThird Party Advisory