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CVE-2023-5554

28
FAUCET Score

CVE-2023-5554 is a critical vulnerability affecting LINE Client for iOS versions prior to 13.16.0, stemming from a lack of TLS certificate verification during log transmission within a financial module. This flaw allows for high impact to confidentiality, integrity, and availability with low attack complexity and no user interaction required, as reflected by its CVSS score of 9.8. Despite its severity and potential for remote exploitation, there is currently no public exploit code, active exploitation, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 13.16.0CPE matchmatch criteria
cpe:2.3:a:linecorp:line:*:*:*:*:*:iphone_os:*:*

CVSS Data

CVSS version used by this source: 3.1

4.8MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.22%
Probability of exploitation in next 30 days
EPSS Percentile
12.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0022 is in the 1st percentile among its peer group of 36,862 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

hackerone.com / reports/2106827
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