High severity8.1NVD Advisory· Published Jul 30, 2019· Updated Jun 17, 2026
CVE-2019-5456
CVE-2019-5456
Description
SMTP MITM refers to a malicious actor setting up an SMTP proxy server between the UniFi Controller version <= 5.10.21 and their actual SMTP server to record their SMTP credentials for malicious use later.
Affected products
3- Range: <=5.10.21
Patches
Vulnerability mechanics
References
4- community.ui.com/releases/862b962b-55f6-4324-96be-610f647d5c1cnvdRelease NotesVendor Advisory
- community.ui.com/releases/9f698d0b-8279-40d3-9f1a-d36db4813124nvdRelease NotesVendor Advisory
- community.ui.com/releases/Security-Advisory-Bulletin-003-003/982bbaa8-2a07-4f81-a5f6-0bb84753f391nvdVendor Advisory
- hackerone.com/reports/519582nvdPermissions Required
News mentions
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