VDB
msrc_CVE-2026-21527
msrc_CVE-2026-21527
PUBLISHED
CVSS 6.5 MEDIUM
Risk Scores
CVSS v3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Microsoft Exchange Server 2019 Cumulative Update 15 <15.02.1748.043 | ||
| Microsoft Exchange Server 2019 Cumulative Update 15 15.02.1748.043 | ||
| Microsoft Exchange Server 2019 Cumulative Update 14 <15.02.1544.039 | ||
| Microsoft Exchange Server 2016 Cumulative Update 23 15.01.2507.066 | ||
| Microsoft Exchange Server Subscription Edition RTM <15.02.2562.037 | ||
| Microsoft Exchange Server 2019 Cumulative Update 14 15.02.1544.039 | ||
| Microsoft Exchange Server 2016 Cumulative Update 23 <15.01.2507.066 | ||
| Microsoft Exchange Server Subscription Edition RTM 15.02.2562.037 |
Timeline
- Feb 10, 2026 CVE Published
- Apr 8, 2026 Security Advisory
- Apr 8, 2026 Security Advisory
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21527 advisory
- https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-21527.json advisory
- https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1 url
- https://support.microsoft.com/lifecycle url
- https://www.first.org/cvss url
- https://support.microsoft.com/help/5074992 fix
- https://support.microsoft.com/help/5074995 fix
- https://support.microsoft.com/help/5074993 fix
- https://support.microsoft.com/help/5074994 fix