Microsoft Exchange 2013 CU23 SU21
Microsoft Exchange 2013 CU23 SU21
The Microsoft Exchange 2013 CU23 SU21 reached end of service life on Apr 11, 2023 — Microsoft no longer ships security patches or fixes for it. Our third-party support keeps it safe to run: 24/7 engineers manage issues, remediate vulnerabilities, and help you maintain compliance.
24/7 engineers own your Microsoft Exchange 2013 CU23 SU21 incidents end to end.
Mitigation and patch-around guidance when the vendor no longer ships fixes.
Controls evidence and documentation that keep auditors satisfied.
Specifications
- product
- msexchange
- release
- 2013
- product Label
- Microsoft Exchange
- release Label
- 2013 CU23 SU21
- codename
- lts
- latest Version
- 15.0.1497.48
- release Date
- 2013-01-09
- maintained
- source Url
- https://endoflife.date/msexchange
Lifecycle Dates
- End of Service Life
- Apr 11, 2023
- Last OEM Support
- Apr 10, 2018
OEM vs. 3rd Party Support
See how third-party support compares to the vendor contract for Microsoft Exchange 2013 CU23 SU21 — monitoring, break/fix, vulnerability work, operations and compliance, before and after EOSL.
| Feature | OEM Support | 3rd Party Support |
|---|---|---|
| Post-EOSL Support | ||
| Break/Fix Support | Until EOSL | |
| 24/7 Monitoring | ||
| Vulnerability Scanning & Remediation | ||
| Managed Operations | ||
| Procedure & Configuration Review | ||
| Compliance & Audit Documentation | Limited | |
| Discounted Migration to Other Platforms |
Why Choose 3rd Party Support for Microsoft Exchange 2013 CU23 SU21?
Vulnerability Remediation
Scanning, mitigation and patch-around guidance for Microsoft Exchange 2013 CU23 SU21 when the vendor no longer ships fixes.
Compliance Maintenance
Procedure review, controls evidence and the documentation auditors ask for — maintained continuously, not scrambled at audit time.
24/7 Expert Support
Engineers who know this release monitor, manage and fix issues around the clock — break/fix to managed operations.
Microsoft Exchange 2013 CU23 SU21 Support: Frequently Asked Questions
Is the Microsoft Exchange 2013 CU23 SU21 still supported?
Microsoft ended support for the Microsoft Exchange 2013 CU23 SU21 on Apr 11, 2023 — no more patches or fixes from the vendor. Third-party support keeps it covered: our engineers manage issues, remediate vulnerabilities, and help you maintain compliance for as long as you run it.
When is the Microsoft Exchange 2013 CU23 SU21 end of service life (EOSL) date?
Microsoft lists the end of service life for the Microsoft Exchange 2013 CU23 SU21 as Apr 11, 2023.
Can I keep using the Microsoft Exchange 2013 CU23 SU21 after its EOSL date?
Yes. EOSL means Microsoft stops issuing patches and support — the software itself keeps running. Third-party support covers it from there: issue management, security vulnerability remediation, and the compliance documentation auditors ask for, for as long as you choose to run it.
How much does third-party support for the Microsoft Exchange 2013 CU23 SU21 cost?
Typically 40-70% below the OEM maintenance renewal price. Exact pricing depends on quantity, service level and location — request a quote and we respond within 24 hours.
Known Vulnerabilities Affecting Microsoft Exchange 2013 CU23 SU21
103 published CVEs affect the Microsoft Exchange 2013 CU23 SU21, including 53 rated critical or high severity. Microsoft no longer ships security patches for this release — our engineers provide mitigation guidance, workarounds and hardening support.
| CVE | Severity | CVSS | Published | Summary |
|---|---|---|---|---|
| CVE-2021-28481 | CRITICAL | 9.8 | Apr 13, 2021 | Microsoft Exchange Server Remote Code Execution Vulnerability |
| CVE-2021-28480 | CRITICAL | 9.8 | Apr 13, 2021 | Microsoft Exchange Server Remote Code Execution Vulnerability |
| CVE-2019-1373 | CRITICAL | 9.8 | Nov 12, 2019 | A remote code execution vulnerability exists in Microsoft Exchange through the deserialization of metadata via PowerShell, aka 'Microsoft Exchange Remote Code Execution Vulnerability'. |
| CVE-2018-8302 | CRITICAL | 9.8 | Aug 15, 2018 | A remote code execution vulnerability exists in Microsoft Exchange software when the software fails to properly handle objects in memory, aka "Microsoft Exchange Memory Corruption Vulnerability." This affects Microsoft Exchange Server. |
| CVE-2018-8154 | CRITICAL | 9.8 | May 9, 2018 | A remote code execution vulnerability exists in Microsoft Exchange software when the software fails to properly handle objects in memory, aka "Microsoft Exchange Memory Corruption Vulnerability." This affects Microsoft Exchange Server. This CVE ID is unique from CVE-2018-8151. |
| CVE-2021-34473 | CRITICAL | 9.1 | Jul 14, 2021 | Microsoft Exchange Server Remote Code Execution Vulnerability |
| CVE-2021-27078 | CRITICAL | 9.1 | Mar 3, 2021 | Microsoft Exchange Server Remote Code Execution Vulnerability |
| CVE-2021-26855 | CRITICAL | 9.1 | Mar 3, 2021 | Microsoft Exchange Server Remote Code Execution Vulnerability |
| CVE-2021-26412 | CRITICAL | 9.1 | Mar 3, 2021 | Microsoft Exchange Server Remote Code Execution Vulnerability |
| CVE-2020-17142 | CRITICAL | 9.1 | Dec 10, 2020 | Microsoft Exchange Remote Code Execution Vulnerability |
| CVE-2020-17132 | CRITICAL | 9.1 | Dec 10, 2020 | Microsoft Exchange Remote Code Execution Vulnerability |
| CVE-2022-21969 | CRITICAL | 9.0 | Jan 11, 2022 | Microsoft Exchange Server Remote Code Execution Vulnerability |
| CVE-2022-21855 | CRITICAL | 9.0 | Jan 11, 2022 | Microsoft Exchange Server Remote Code Execution Vulnerability |
| CVE-2022-21846 | CRITICAL | 9.0 | Jan 11, 2022 | Microsoft Exchange Server Remote Code Execution Vulnerability |
| CVE-2021-26427 | CRITICAL | 9.0 | Oct 13, 2021 | Microsoft Exchange Server Remote Code Execution Vulnerability |
| CVE-2021-34523 | CRITICAL | 9.0 | Jul 14, 2021 | Microsoft Exchange Server Elevation of Privilege Vulnerability |
| CVE-2021-28483 | CRITICAL | 9.0 | Apr 13, 2021 | Microsoft Exchange Server Remote Code Execution Vulnerability |
| CVE-2023-21707 | HIGH | 8.8 | Feb 14, 2023 | Microsoft Exchange Server Remote Code Execution Vulnerability |
| CVE-2023-21706 | HIGH | 8.8 | Feb 14, 2023 | Microsoft Exchange Server Remote Code Execution Vulnerability |
| CVE-2023-21529 | HIGH | 8.8 | Feb 14, 2023 | Microsoft Exchange Server Remote Code Execution Vulnerability |
Showing the 20 most severe of 103 known CVEs.
Get Third Party Support