CVE-2026-45502: Microsoft Exchange Server Information Disclosure Vulnerability

Published Jun 9, 2026
·
Updated

Microsoft Exchange Server Information Disclosure Vulnerability

Other sources

Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.

— Microsoft

Affected Software

9 affected componentsFixes available
Microsoft Exchange Server
Microsoft Exchange Server=2016-cumulative_update_23
Microsoft Exchange Server=2019-cumulative_update_14
Microsoft Exchange Server=2019-cumulative_update_15
Microsoft Exchange Server Subscription Edition<15.02.2562.043
Microsoft Exchange Server Subscription Edition RTM<15.02.2562.045
15.02.2562.045
Microsoft Exchange Server 2019=14
15.02.1544.043
Microsoft Exchange Server 2016=23
15.01.2507.071
Microsoft Exchange Server 2019=15
15.02.1748.048

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 15.02.2562.045Patch KB5103212
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 15.02.1544.043Patch KB5103214
  3. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 15.01.2507.071Patch KB5103215
  4. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 15.02.1748.048Patch KB5103213

Event History

Jun 9, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Description
CVE Published
via MITRE·05:04 PM
Data Sourced
via MITRE·05:04 PM
DescriptionSeverity
Data Sourced
via NVD·05:17 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-45502?

CVE-2026-45502 has a medium severity level rated at 5.

2

How do I fix CVE-2026-45502?

To remediate CVE-2026-45502, you should apply the necessary patches and security updates provided for Microsoft Exchange Server.

3

What systems are affected by CVE-2026-45502?

CVE-2026-45502 affects Microsoft Exchange Server 2019, Microsoft Exchange Server Subscription Edition RTM, and Microsoft Exchange Server 2016.

4

What does CVE-2026-45502 allow an attacker to do?

CVE-2026-45502 allows an authorized attacker to perform server-side request forgery, potentially disclosing sensitive information over a network.

5

Is CVE-2026-45502 an information disclosure vulnerability?

Yes, CVE-2026-45502 is classified as an information disclosure vulnerability due to its nature of allowing unauthorized information access.

Company

Resources

Contact

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CVE-2026-45502 - Microsoft Exchange Server Information Disclosure Vulnerability - SecAlerts