# CVE-2026-55007

## Summary

- **CVE ID:** CVE-2026-55007
- **Severity:** HIGH
- **CVSS Score:** 8.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
- **CWE:** CWE-415
- **Published:** Sep 8, 2026
- **Last Modified:** Sep 18, 2026

## Description

Double free in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.

## Affected Products

- Microsoft — Microsoft Exchange Server 2019 Cumulative Update 14 (15.02.0.0)
- Microsoft — Microsoft Exchange Server 2019 Cumulative Update 15 (15.02.0.0)
- Microsoft — Microsoft Exchange Server Subscription Edition RTM (15.02.0.0)

## References

- [CNA](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55007)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.73%
- **EPSS Percentile:** 52.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._