---
title: "CVE-2025-48928: TeleMessage TM SGNL Exposure of Core Dump File to an Unauthorized Control Sphere Vulnerability"
url: https://erroneo.us/security/cve/CVE-2025-48928/
description: "CVE-2025-48928 (TeleMessage TM SGNL): Exploited in the wild (CISA KEV). The TeleMessage service through 2025-05-05 is based on a JSP application in which…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-05-28
date_modified: 2026-02-26
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-48928"
kev: true
cvss: 4
epss: 0.00553
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-48928: TeleMessage TM SGNL Exposure of Core Dump File to an Unauthorized Control Sphere 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 2025-07-01, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-07-22 ; treat that as the outer limit, not the target.
- EPSS 0.6% , percentile 45: FIRST’s model estimates a 0.6% chance of exploitation activity in the next 30 days, higher than 45% 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 service through 2025-05-05 is based on a JSP application in which the heap content is roughly equivalent to a "core dump" in which a password previously sent over HTTP would be included in this dump, as exploited in the wild in May 2025.

## Affected products (CVE record)

- TeleMessage service: <= 2025-05-05

## Severity

- mitre CVSS 3.1: 4 `CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`

## Exploitation

- CISA KEV: added 2025-07-01; federal due date 2025-07-22. 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): 0.55% probability of exploitation activity in the next 30 days; percentile 45.

## Sources

- [CVE.org record CVE-2025-48928](https://www.cve.org/CVERecord?id=CVE-2025-48928)
- [NVD entry CVE-2025-48928](https://nvd.nist.gov/vuln/detail/CVE-2025-48928)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-48928)
- [wired.com](https://www.wired.com/story/how-the-signal-knock-off-app-telemessage-got-hacked-in-20-minutes/)

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Source page: https://erroneo.us/security/cve/CVE-2025-48928/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt