Historical catalog analysis: CISA added this entry on May 12, 2025. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.
What the vulnerability is
CVE-2025-47729 describes a vulnerability (CWE-912) in TeleMessage TM SGNL involving hidden functionality. Specifically, the product’s archiving backend stores cleartext copies of messages sent by application users. This exposure means that data intended to be secure may be stored in an unencrypted state within the backend infrastructure.
Exposure and applicability
This vulnerability affects organizations utilizing TeleMessage TM SGNL that employ the archiving backend functionality. The risk is centered on the confidentiality of user communications; any entity or process with access to the archiving backend could potentially access these cleartext messages. Because this involves hidden functionality, standard visibility into data encryption at rest may not have revealed this exposure.
Remediation priorities
Given that CISA added this vulnerability to the Known Exploited Vulnerabilities (KEV) catalog on May 12, 2025, remediation should be prioritized. Our analysis suggests the following decision path for security leaders:
- Identify Backend Usage: Determine if the TM SGNL deployment utilizes the archiving backend.
- Apply Vendor Mitigations: If the backend is in use, apply mitigations as specified by TeleMessage vendor instructions.
- Evaluate Cloud Guidance: For cloud-based deployments, follow applicable BOD 22-01 guidance to ensure service provider compliance.
- Product Discontinuation: In scenarios where vendor mitigations are unavailable or insufficient to eliminate cleartext storage, the source indicates that discontinuing use of the product is a necessary action to remove the exposure.
How to validate remediation
Verification must go beyond a simple version check, as the vulnerability involves how data is handled in the backend. To verify that exposure has been reduced, defenders should:
- Request Evidence of Encryption: Seek technical confirmation from the vendor or through authorized audits that messages are no longer stored in cleartext within the archiving backend.
- Verify Mitigation Deployment: Confirm that all vendor-prescribed configuration changes or patches have been applied across the environment.
Limits and open questions
There is residual risk if the vendor cannot provide a method to purge previously archived cleartext messages; applying a fix may prevent future cleartext storage but leave historical data exposed. Additionally, it remains unknown whether this vulnerability has been utilized in ransomware campaigns. The effectiveness of any mitigation depends entirely on the specific instructions provided by TeleMessage, which are not detailed in the CISA catalog entry.
Source and editorial note
CVE-2025-47729: TeleMessage TM SGNL Hidden Functionality Vulnerability · Source date: May 12, 2025 · Retrieved August 31, 2026.
Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.
Archive date: May 15, 2025. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: October 15, 2026 at 00:35 UTC.
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