How severe is CVE-2018-13446?

CVE-2018-13446 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-13446 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-13446?

CVE-2018-13446 affects Linecorp Line. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-13446?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-13446 published?

CVE-2018-13446 was published on 2018-08-16 and last updated on 2026-06-17.

CVE-2018-13446

CVE-2018-13446 is a high-severity vulnerability in Linecorp Line with a CVSS 3.x base score of 7.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 3.x base score 7.0)
CVSS v2: 4.4
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Linecorp Line
Published: 2018-08-16
Last modified: 2026-06-17

Description

An issue was discovered in the LINE jp.naver.line application 8.8.1 for Android. The Passcode feature allows authentication bypass via runtime manipulation that forces a certain method's return value to true. In other words, an attacker could authenticate with an arbitrary passcode. NOTE: the vendor indicates that this is not an attack of interest within the context of their threat model, which excludes Android devices on which rooting has occurred

Frequently asked questions

What is CVE-2018-13446?: An issue was discovered in the LINE jp.naver.line application 8.8.1 for Android. The Passcode feature allows authentication bypass via runtime manipulation that forces a certain method's return value to true. In other words, an attacker could authenticate with an arbitrary passcode. NOTE: the vendor indicates that this is not an attack of interest within the context of their threat model, which excludes Android devices on which rooting has occurred
How severe is CVE-2018-13446?: CVE-2018-13446 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-13446 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-13446?: CVE-2018-13446 affects Linecorp Line. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-13446?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-13446 published?: CVE-2018-13446 was published on 2018-08-16 and last updated on 2026-06-17.

References

https://gist.github.com/tanprathan/efde53e5b312f50edb08f050b6be3928

Affected products (1)

cpe:2.3:a:linecorp:line:8.8.1:*:*:*:*:android:*:*

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Other CWE-287 (Improper Authentication) vulnerabilities

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