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CVE-2018-0518

21
FAUCET Score

CVE-2018-0518 describes a critical vulnerability in LINE for iOS versions 7.1.3 through 7.1.5, where the application fails to properly validate X.509 certificates from SSL servers. This flaw enables man-in-the-middle (MitM) attackers to impersonate legitimate servers using crafted certificates, potentially leading to the interception of sensitive user information. Rated with a CVSS score of 5.9 (Medium), the vulnerability has a network attack vector and high confidentiality impact, though it requires a high attack complexity. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 7.1.3, <= 7.15CPE matchmatch criteria
cpe:2.3:a:linecorp:line:*:*:*:*:*:iphone_os:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.60%
Probability of exploitation in next 30 days
EPSS Percentile
45.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0060 is in the 8th percentile among its peer group of 19,958 CVEs.

Social Chatter

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

Remediation records are not available for this CVE.

References

jvn.jp / en/jp/JVN75453852/index.html
Third Party AdvisoryVDB Entry
linecorp.com / en/security/article/136
Vendor Advisory