What is CVE-2017-10819?

CVE-2017-10819 is a medium-severity vulnerability in Intercom Malion, classified under Improper Certificate Validation. CVSS score: 5.9/10. Published 2017-08-04.

How severe is CVE-2017-10819?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Intercom Malion

CVE-2017-10819

MaLion for Mac 4.3.0 to 5.2.1 does not properly validate certificates, which may allow an attacker to eavesdrop on an encrypted communication.

Vulnerability class: Improper Certificate Validation

Published 2017-08-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.008 (53.9th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.9% 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

Intercom Malion
Intercom, Inc. Malion For Mac — versions 4.3.0 to 5.2.1

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

www.intercom.co.jp/information/2017/0801.html (Vendor Advisory)
jvn.jp/en/vu/JVNVU91587298/index.html (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2017-10819?: CVE-2017-10819 is a medium-severity vulnerability in Intercom Malion, classified under Improper Certificate Validation. CVSS score: 5.9/10. Published 2017-08-04.
How severe is CVE-2017-10819?: Medium severity. CVSS v3 base score is 5.9 out of 10.