Description
Microsoft Exchange Server Remote Code Execution Vulnerability
Analysis
Analysis and contextual insights are available on OpenCVE Cloud.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
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| Microsoft | Microsoft Exchange Server 2013 Cumulative Update 21 | affected |
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| Microsoft | Microsoft Exchange Server 2013 Cumulative Update 22 | affected |
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| Microsoft | Microsoft Exchange Server 2013 Cumulative Update 23 | affected |
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| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 10 | affected |
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| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 11 | affected |
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| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 12 | affected |
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| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 13 | affected |
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| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 14 | affected |
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| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 15 | affected |
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| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 16 | affected |
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| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 17 | affected |
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| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 18 | affected |
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| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 19 | affected |
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| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 8 | affected |
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| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 9 | affected |
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| Microsoft | Microsoft Exchange Server 2019 | affected |
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| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 1 | affected |
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| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 2 | affected |
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| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 3 | affected |
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| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 4 | affected |
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| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 5 | affected |
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| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 6 | affected |
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| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 7 | affected |
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| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 8 | affected |
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Configuration 1 [-]
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No data.
No data available yet.
Remediation
No solution or workaround provided in the CVE record.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
Sign in to view the affected projects.
Advisories
No advisories yet.
References
History
Wed, 19 Aug 2026 18:45:00 +0200
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:microsoft:exchange_server:*:*:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_10:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_11:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_12:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_13:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_14:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_15:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_16:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_17:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_18:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_19:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_1:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_21:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_22:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_23:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_2:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_3:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_4:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_5:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_6:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_7:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_8:*:*:*:*:*:* cpe:2.3:a:microsoft:exchange_server:*:cumulative_update_9:*:*:*:*:*:* |
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| References |
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Wed, 22 Oct 2025 02:15:00 +0200
| Type | Values Removed | Values Added |
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| References |
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Tue, 21 Oct 2025 22:30:00 +0200
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Tue, 21 Oct 2025 21:30:00 +0200
| Type | Values Removed | Values Added |
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Wed, 16 Jul 2025 15:45:00 +0200
| Type | Values Removed | Values Added |
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| Metrics |
epss
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epss
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Tue, 15 Jul 2025 15:45:00 +0200
| Type | Values Removed | Values Added |
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| Metrics |
epss
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epss
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Mon, 14 Jul 2025 15:45:00 +0200
| Type | Values Removed | Values Added |
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| Metrics |
epss
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epss
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Sat, 12 Jul 2025 15:45:00 +0200
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
epss
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epss
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Tue, 04 Feb 2025 21:15:00 +0100
| Type | Values Removed | Values Added |
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| Metrics |
kev
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MITRE
Status: PUBLISHED
Assigner: microsoft
Published:
Updated: 2026-08-19T16:30:15.282Z
Reserved: 2021-02-08T00:00:00.000Z
Link: CVE-2021-26855
Vulnrichment
Updated: 2024-08-03T20:33:40.999Z
NVD
Status : Analyzed
Published: 2021-03-03T00:15:12.103
Modified: 2026-08-19T19:22:24.100
Link: CVE-2021-26855
Redhat
No data.
OpenCVE Enrichment
No data.
Weaknesses
-
CWE-918
Server-Side Request Forgery (SSRF)