TeleMessage · TM SGNL
CVE-2025-47729
TeleMessage TM SGNL Hidden Functionality Vulnerability
What it is
The TeleMessage archiving backend through 2025-05-05 holds cleartext copies of messages from TM SGNL (aka Archive Signal) app users, which is different functionality than described in the TeleMessage "End-to-End encryption from the mobile phone through to the corporate archive" documentation, as exploited in the wild in May 2025.
CISA: TeleMessage TM SGNL contains a hidden functionality vulnerability in which the archiving backend holds cleartext copies of messages from TM SGNL application users.
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Deadline for US federal agencies: June 2, 2025
More exploited flaws from TeleMessage
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Jul 1, 2025 | Initialization of a Resource with an Insecure Default | TM SGNL | Medium 5.3 | 12% |
| Jul 1, 2025 | Exposure of Core Dump File to an Unauthorized Control Sphere | TM SGNL | Medium 4.0 | 0.6% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.