Security Digest · Vulnerability record · Known exploited
CVE-2025-47729: TeleMessage TM SGNL Hidden Functionality Vulnerability
Exploited in the wild (CISA KEV). 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"…
CISA KEV · added 2025-05-12 CVSS 1.9 Low EPSS 0.4% · p38
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Yes, if you run TeleMessage TM SGNL. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-05-12, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-06-02; treat that as the outer limit, not the target.
- EPSS 0.4%, percentile 38: FIRST’s model estimates a 0.4% chance of exploitation activity in the next 30 days, higher than 38% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs local access needed. Lower urgency for most teams unless an attacker could already run code on the machine.
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’s summary
TeleMessage TM SGNL contains a hidden functionality vulnerability in which the archiving backend holds cleartext copies of messages from TM SGNL application users.
Weakness type: CWE-912.
Product: TeleMessage TM SGNL · Assigned by: mitre · Published: 2025-05-08
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| TeleMessage | archiving backend | <= 2025-05-05 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| mitre | 3.1 | 1.9 Low | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N |
- Attack vector: local access needed
- Attack complexity: high (needs special conditions)
- Privileges required: high (admin)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: added 2025-05-12; federal due date 2025-06-02. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active, automatable no, technical impact partial.
- FIRST EPSS (model of 2026-10-21): 0.45% probability of exploitation activity in the next 30 days; percentile 38.
Timeline
- — CVE record published by mitre
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vulnerability records
- CVE.org record CVE-2025-47729 cve.org
- NVD entry CVE-2025-47729 nvd.nist.gov
Government
Other references from the CVE record and advisory
- news.ycombinator.com news.ycombinator.com
- arstechnica.com arstechnica.com
- theregister.com theregister.com
All exploited TeleMessage vulnerabilities · Today’s Security Digest