CVE-2025-48928: TeleMessage TM SGNL Exposure of Core Dump File to an Unauthorized Control Sphere Vulnerability

CVE-2025-48928 is an exposure of core dump file to an unauthorized control sphere vulnerability in TeleMessage TM SGNL. The issue arises in a JSP application whose heap content functions roughly like a core dump and can retain a password that was previously sent over HTTP. For IT and security teams, this matters because unauthorized parties who can reach the exposed dump may recover sensitive credentials that enable further access to messaging systems or related infrastructure.

Public detail is limited to the CISA summary and CWE classification; exact attack paths, affected versions, and scores must be confirmed against the vendor advisory. Known ransomware use is not documented.

How it works

The weakness is classified as CWE-528: Exposure of Core Dump File to an Unauthorized Control Sphere. In this case the product is a JSP application whose in-memory heap content is treated as roughly equivalent to a core dump. A password that was earlier transmitted over HTTP can remain present in that dump. An attacker who obtains access to the dump file or the sphere that holds it can extract the residual credential material. No further exploit mechanics are supplied in the available facts; defenders should treat any unauthorized retrieval of the dump as a credential-compromise event and verify the precise conditions in the vendor advisory.

Am I affected? How to find it in your systems

TeleMessage TM SGNL is the affected product. Inventory any deployments of this messaging or signaling software, whether on-premises, virtualized, or delivered as a cloud service. Check configuration management databases, software asset inventories, and container or cloud resource tags for the product name. Because the vulnerability involves a JSP application and heap content that may contain HTTP-transmitted passwords, examine systems that host JSP runtimes and that process authentication or messaging traffic over HTTP.

Review access controls on any directories or storage locations that could hold core dumps, heap dumps, or equivalent diagnostic files. Look for unexpected dump files, world-readable permissions, or dumps accessible from untrusted networks. Log and telemetry signs of exploitation are not detailed in the facts; monitor for anomalous access to dump locations, unusual process crashes that generate dumps, or subsequent authentication attempts that reuse credentials known only from internal traffic. Confirm the precise versions and configurations against the vendor advisory.

How to remediate

Apply mitigations per the vendor instructions for TeleMessage TM SGNL. Follow applicable BOD 22-01 guidance for cloud services. If mitigations are unavailable, discontinue use of the product. After applying the vendor-recommended update or configuration change, verify that dump files are no longer exposed to unauthorized control spheres and that residual credentials cannot be recovered from heap content. Rotate any passwords that may have been transmitted over HTTP while the vulnerable configuration was active. Harden the environment by ensuring diagnostic dumps are written only to protected storage, are promptly cleaned up, and are never served by the web application itself.

If you can't patch immediately

Until the vendor mitigation can be applied, reduce exposure with compensating controls. Segment the TeleMessage TM SGNL hosts so that dump storage and the JSP application are reachable only from trusted management networks. Disable or tightly restrict any feature that generates or exposes heap or core dumps. If a web application firewall or virtual-patching capability is available, block requests that attempt to retrieve dump files or diagnostic endpoints. Increase monitoring for access to dump locations and for authentication events that might indicate credential reuse. These steps lower risk but do not replace the vendor-prescribed remediation; plan to apply the official mitigations or discontinue use as soon as possible.

If your data may have been exposed

Actively exploited vulnerabilities can lead to breaches in which credentials and other sensitive data are obtained. If dump files or residual passwords may have been accessible, treat the incident as a potential credential compromise: rotate affected passwords, review authentication logs for misuse, and assess whether broader messaging or system access was obtained. Readers can run a free exposure scan of their email addresses to check whether those addresses appear in known breach data sets.