How severe is CVE-2018-3988?

CVE-2018-3988 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-3988 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-3988?

CVE-2018-3988 affects Signal Private Messenger. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-3988?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-3988 published?

CVE-2018-3988 was published on 2018-12-10 and last updated on 2026-06-17.

CVE-2018-3988

CVE-2018-3988 is a medium-severity vulnerability in Signal Private Messenger with a CVSS 3.x base score of 4.7. 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-200.

Key facts

Severity: Medium (CVSS 3.x base score 4.7)
CVSS v2: 1.9
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Signal Private Messenger
Published: 2018-12-10
Last modified: 2026-06-17

Description

Signal Messenger for Android 4.24.8 may expose private information when using "disappearing messages." If a user uses the photo feature available in the "attach file" menu, then Signal will leave the picture in its own cache directory, which is available to any application on the system.

Frequently asked questions

What is CVE-2018-3988?: Signal Messenger for Android 4.24.8 may expose private information when using "disappearing messages." If a user uses the photo feature available in the "attach file" menu, then Signal will leave the picture in its own cache directory, which is available to any application on the system.
How severe is CVE-2018-3988?: CVE-2018-3988 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-3988 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-3988?: CVE-2018-3988 affects Signal Private Messenger. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-3988?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-3988 published?: CVE-2018-3988 was published on 2018-12-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:signal:private_messenger:4.24.8:*:*:*:*:android:*:*

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