Critical severity · published Mar 28, 2026
CVE-2025-9497
Hardcoded Upgrade Decryption Passwords
9.8
CVSS
0.3%
EPSS
No
On KEV
Description
Use of Hard-coded Credentials vulnerability in Microchip Time Provider 4100 allows Malicious Manual Software Update.This issue affects Time Provider 4100: before 2.5.0.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% 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 2.5.0 · source: vendor
T4
Timeprovider 4100 Firmware · Microchip
before 2.5.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-9497
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-9497
Vendor Advisory
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-hardcoded-upgrade-decryption-passwords
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