What is CVE-2021-25376?

CVE-2021-25376 is a low-severity vulnerability in Samsung Email, classified under Information Disclosure. CVSS score: 3.1/10. Published 2021-04-09.

How severe is CVE-2021-25376?

Low severity. CVSS v3 base score is 3.1 out of 10.

Information disclosure in Samsung Email

CVE-2021-25376

An improper synchronization logic in Samsung Email prior to version 6.1.41.0 can leak messages in certain mailbox in plain text when STARTTLS negotiation is failed.

Vulnerability class: Information Disclosure

Published 2021-04-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.008 (54.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Samsung Email
Samsung Mobile Email — versions unspecified

Weakness classification (CWE)

References

security.samsungmobile.com/ (Vendor Advisory)
security.samsungmobile.com/serviceWeb.smsb (Vendor Advisory)

Frequently asked questions

What is CVE-2021-25376?: CVE-2021-25376 is a low-severity vulnerability in Samsung Email, classified under Information Disclosure. CVSS score: 3.1/10. Published 2021-04-09.
How severe is CVE-2021-25376?: Low severity. CVSS v3 base score is 3.1 out of 10.