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Exploited vulnerability · CISA KEV

Is CVE-2025-48928 exploited? Yes: in CISA KEV since 1 Jul 2025

Gociux · TeleMessage TM SGNL · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2025-48928, TeleMessage TM SGNL Exposure of Core Dump File to an Unauthorized Control Sphere Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 1 Jul 2025, 34 days after it was published. It affects TeleMessage TM SGNL. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 1 Jul 2025
ransomwareNot knownno confirmed use
EPSSbelow top 10%lower predicted activity right now (it is still confirmed exploited)
severity4CVSS 3.1 · medium
US federal due22 Jul 2025BOD 22-01 deadline

What it is

TeleMessage TM SGNL contains an exposure of core dump file to an unauthorized control sphere Vulnerability. This vulnerability 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.

VendorTeleMessage (3 exploited CVEs in KEV)
ProductTM SGNL
VulnerabilityTeleMessage TM SGNL Exposure of Core Dump File to an Unauthorized Control Sphere Vulnerability
WeaknessCWE-528
Published28 May 2025
Added to KEV1 Jul 2025
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for TM SGNL in your asset inventory, including appliances and cloud images. Stack check lists every exploited TeleMessage CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 28 May 2025.
  4. Get told next time. Email alerts when CISA adds a CVE for TeleMessage.

Other exploited CVEs in TM SGNL

References

Questions

Is CVE-2025-48928 being exploited?

Yes. CISA added CVE-2025-48928 to the Known Exploited Vulnerabilities catalog on 1 Jul 2025, which means there is reliable evidence of exploitation in the wild.

Is CVE-2025-48928 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2025-48928?

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Check TeleMessage's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected TM SGNL and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in July 2025 · TeleMessage scorecard · act-now radar.

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