Microsoft Exchange Server Security Feature Bypass Vulnerability
Why this VPI (explainable, experimental)
VPI breakdown
| Impact | 66.00 |
| Exploitation signal(KEV listed) | ×1.50 |
| Ransomware bonus | +5.00 |
| VPI | 100.00 |
VPI formula vpi-v1
Required Action
Apply updates per vendor instructions.
This CVE is referenced in a KISA security bulletin (Korean only).
| Source | CVSS Version | Base Score | Severity | Vector String | Assessment Date |
|---|---|---|---|---|---|
| NVDNIST | 3.1 | 6.6 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H | 04/20/2026 |
| NVDNIST | 2.0 | 6.5 |
Microsoft Exchange Server Security Feature Bypass Vulnerability
| AV:N/AC:L/Au:S/C:P/I:P/A:P |
| 04/20/2026 |