---
title: "CVE-2025-47729: TeleMessage TM SGNL Hidden Functionality Vulnerability"
url: https://erroneo.us/security/cve/CVE-2025-47729/
description: "CVE-2025-47729 (TeleMessage TM SGNL): Exploited in the wild (CISA KEV). The TeleMessage archiving backend through 2025-05-05 holds cleartext copies of…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-05-08
date_modified: 2025-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-47729"
kev: true
cvss: 1.9
epss: 0.00447
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-47729: TeleMessage TM SGNL Hidden Functionality Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- 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.

## Affected products (CVE record)

- TeleMessage archiving backend: <= 2025-05-05

## Severity

- mitre CVSS 3.1: 1.9 `CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N`

## Exploitation

- 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.

## Sources

- [CVE.org record CVE-2025-47729](https://www.cve.org/CVERecord?id=CVE-2025-47729)
- [NVD entry CVE-2025-47729](https://nvd.nist.gov/vuln/detail/CVE-2025-47729)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-47729)
- [news.ycombinator.com](https://news.ycombinator.com/item?id=43909220)
- [arstechnica.com](https://arstechnica.com/security/2025/05/signal-clone-used-by-trump-official-stops-operations-after-report-it-was-hacked/)
- [theregister.com](https://www.theregister.com/2025/05/05/telemessage_investigating/)

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Source page: https://erroneo.us/security/cve/CVE-2025-47729/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt