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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.5.0)"}}], "enrichment": {"confidence": 98.0, "confidence_source": "matching", "scores": [{"score": 98.0, "source": "matching"}]}, "original": {"product": "Time Provider 4100", "source": "cna", "vendor": "Microchip"}, "product": "timeprovider_4100", "vendor": "microchip"}], "analysis": {"en": {"generated_at": "2026-03-28T12:21:07.431483+00:00", "value": {"mitigation_remediation": ["Update the device to firmware version 2.5.0 or later, which removes the hard\u2011coded decryption passwords.", "If an update is not possible, isolate the upgrade management port so it is not reachable from untrusted networks.", "Configure ACLs on the management port to allow connections only from trusted IP addresses.", "Verify that the device is running the patched firmware version before performing any further operations.", "Contact Microchip for additional guidance if the device cannot be upgraded or reconfigured."], "summary": {"action": "Apply patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Microchip Time Provider 4100 devices running firmware versions earlier than 2.5.0; newer releases contain the fix.", "description_and_impact": "Microchip Time Provider 4100 firmware before version 2.5.0 uses hard\u2011coded passwords to decrypt upgrade images, allowing a malicious actor to craft a forged update that will be accepted and installed by the device. This flaw could lead to arbitrary code execution, data tampering, or denial of service on the compromised hardware. The weakness is categorized as CWE\u2011798 (Use of Hard\u2011coded Credentials).", "risk_and_exploitability": "The CVSS score of 5.5 reflects moderate severity, and no EPSS value is available. The flaw is not listed in the CISA KEV catalog. Exploitation requires access to the device\u2019s upgrade interface, which operates over a separate management port. If that port is exposed to an untrusted network, an attacker can hijack the upgrade flow and push malicious firmware. When restricted to a trusted environment and protected by ACLs, the risk is greatly reduced, but the fundamental vulnerability remains until the firmware is updated."}}}}, "created": "2026-03-29T20:32:36.093763+00:00", "updated": "2026-03-30T06:59:44.954828+00:00", "vendors": ["microchip", "microchip$PRODUCT$timeprovider_4100"]}