Medium severity · published Feb 24, 2026
CVE-2025-47904
Unsigned upgrade package
4.1
CVSS
0.1%
EPSS
No
On KEV
Description
Download of Code Without Integrity Check vulnerability in Microchip Time Provider 4100 allows Malicious Manual Software Update.This issue affects Time Provider 4100: before 2.5.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
Attack vector
Local
Complexity
High
Privileges
High
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 1% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TP
Time Provider 4100 · Microchip
before 2.5 · source: vendor
T4
Timeprovider 4100 Firmware · Microchip
before 2.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-47904
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-47904
www.gruppotim.it
https://www.gruppotim.it/en/footer/TIM-red-team.html
Vendor Advisory
https://www.microchip.com/en-us/solutions/technologies/embedded-security/how-to-report-potential-product-security-vulnerabilities/timeprovider-4100-unsigned-upgrade-vulnerability
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