VDB
msrc_CVE-2021-42321
msrc_CVE-2021-42321
PUBLISHED
CVSS 8.800000190734863 HIGH
Risk Scores
CVSS v3.1
8.800000190734863
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Microsoft Exchange Server 2019 Cumulative Update 11 <15.02.0986.014 | ||
| Microsoft Exchange Server 2016 Cumulative Update 21 <15.01.2308.020 | ||
| Microsoft Exchange Server 2019 Cumulative Update 10 15.02.0792.019 | ||
| Microsoft Exchange Server 2019 Cumulative Update 10 <15.02.0792.019 | ||
| Microsoft Exchange Server 2016 Cumulative Update 22 15.01.2375.017 | ||
| Microsoft Exchange Server 2016 Cumulative Update 21 15.01.2308.020 | ||
| Microsoft Exchange Server 2016 Cumulative Update 22 <15.01.2375.017 | ||
| Microsoft Exchange Server 2019 Cumulative Update 11 15.02.0986.014 |
Timeline
- Nov 9, 2021 CVE Published
- Jun 21, 2022 CVE Updated
- Sep 30, 2025 PoC Published
- Apr 15, 2026 Security Advisory
- Apr 15, 2026 Security Advisory
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42321 advisory
- https://msrc.microsoft.com/csaf/advisories/2021/msrc_cve-2021-42321.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/5007409 fix