Microsoft
Exchange Server
On-premises Microsoft email and calendaring server.
CU23 Oct26SU (15.1.2507.77)
- Release date
- October 13, 2026
- Security status
- 16 high-severity CVEs tracked in the last 90 days. Current version not affected.
Source
Vendor Release Information
Public release notes are linked for the latest stored release.
Release history
See the latest published releases stored for this product.
| Version | Published | Notes |
|---|---|---|
| CU23 Oct26SU (15.1.2507.77) | 2026-10-13 | Release Notes |
| CU23 Sep26SUv2 (15.1.2507.75) | 2026-10-02 | Release Notes |
| CU23 Sep26SU (15.1.2507.73) | 2026-09-08 | Release Notes |
| CU23 Aug26SU (15.1.2507.72) | 2026-08-11 | Release Notes |
| CU23 Jul26SU (15.1.2507.71) | 2026-07-14 | Release Notes |
| CU23 Jun26SU (15.1.2507.69) | 2026-06-09 | Release Notes |
| CU23 Feb26SU (15.1.2507.66) | 2026-02-10 | Release Notes |
Vulnerability tracking
versionPing monitors CVEs for this product. Matching CVEs are listed below. We only display CVEs with a CVSS score of 7.0 or higher that were published within the last 90 days.
Affected status is inferred from published affected version ranges where available. Always verify against the vendor advisory before making production decisions.
| CVE | Severity | Published | Status | Summary |
|---|---|---|---|---|
| CVE-2026-87696 | HIGH (7.5) | 2026-10-13 | Current versionnot affected | Improper verification of cryptographic signature in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network. Affected versions
|
| CVE-2026-87695 | HIGH (7.8) | 2026-10-13 | Current versionnot affected | Inclusion of functionality from untrusted control sphere in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally. Affected versions
|
| CVE-2026-87692 | HIGH (7.8) | 2026-10-13 | Current versionnot affected | Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally. Affected versions
|
| CVE-2026-77910 | HIGH (8.8) | 2026-10-13 | Current versionnot affected | Incorrect authorization in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network. Affected versions
|
| CVE-2026-70571 | HIGH (8.1) | 2026-10-13 | Current versionnot affected | Stack-based buffer overflow in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network. Affected versions
|
| CVE-2026-70279 | CRITICAL (9.3) | 2026-10-13 | Current versionnot affected | Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network. Affected versions
|
| CVE-2026-96940 | HIGH (8.8) | 2026-10-02 | Current versionnot affected | Weak authentication in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network. Affected versions
|
| CVE-2026-69641 | CRITICAL (9.1) | 2026-09-08 | Current versionnot affected | Missing authorization in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network. Affected versions
|
| CVE-2026-69380 | HIGH (8.1) | 2026-09-08 | Current versionnot affected | Missing authorization in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network. Affected versions
|
| CVE-2026-69378 | HIGH (7.5) | 2026-09-08 | Current versionnot affected | Uncontrolled recursion in Microsoft Exchange Server allows an unauthorized attacker to deny service over a network. Affected versions
|
| CVE-2026-69356 | CRITICAL (9.3) | 2026-09-08 | Current versionnot affected | Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network. Affected versions
|
| CVE-2026-69355 | HIGH (8.8) | 2026-09-08 | Current versionnot affected | External control of file name or path in Microsoft Exchange Server allows an authorized attacker to execute code over a network. Affected versions
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| CVE-2026-62911 | HIGH (8.0) | 2026-08-11 | Current versionnot affected | Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network. Affected versions
|
| CVE-2026-62914 | HIGH (7.3) | 2026-08-11 | Current versionnot affected | Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network. Affected versions
|
| CVE-2026-62913 | HIGH (8.8) | 2026-08-11 | Current versionnot affected | Heap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a network. Affected versions
|
| CVE-2026-62910 | HIGH (7.2) | 2026-08-11 | Current versionnot affected | Improper control of resource identifiers ('resource injection') in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network. Affected versions
|