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CVE-2018-20135

27
FAUCET Score

CVE-2018-20135 is a high-severity vulnerability affecting Samsung Galaxy Apps before version 4.4.01.7. It allows a man-in-the-middle attacker to manipulate the hostname used for load balancing during application installations, enabling them to emulate the app store's API. This flaw stems from a delayed SSL enforcement and a missing app signature validation, ultimately leading to potential Remote Code Execution on affected devices. With a CVSS score of 8.1, this vulnerability has a high impact on confidentiality, integrity, and availability, requiring no user interaction for exploitation. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.4.01.7CPE matchmatch criteria
cpe:2.3:a:samsung:galaxy_apps:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.76%
Probability of exploitation in next 30 days
EPSS Percentile
75.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0176 is in the 34th percentile among its peer group of 8,915 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

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

security.samsungmobile.com / securityUpdate.smsb
Vendor Advisory
adyta.pt / en/2019/01/29/writeup-samsung-app-store-rce-via-mitm-2
ExploitThird Party Advisory