CVE-2026-26137: CWE-918: Server-Side Request Forgery (SSRF) in Microsoft Microsoft Exchange Online
Server-side request forgery (ssrf) in Microsoft Exchange allows an authorized attacker to elevate privileges over a network.
AI Analysis
Technical Summary
This vulnerability, identified as CWE-918, involves server-side request forgery in Microsoft Exchange Online. An authorized attacker can exploit this flaw to elevate privileges within the network. The vulnerability is rated critical with a CVSS 3.1 score of 9.9, reflecting network attack vector, low attack complexity, required privileges, no user interaction, and high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to address this issue.
Potential Impact
Successful exploitation of this SSRF vulnerability can lead to privilege escalation, allowing an attacker with authorized access to gain higher privileges over the network. This can result in significant compromise of confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the vendor-provided patch promptly. Refer to the Microsoft security advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26137 for detailed remediation instructions.
CVE-2026-26137: CWE-918: Server-Side Request Forgery (SSRF) in Microsoft Microsoft Exchange Online
Description
Server-side request forgery (ssrf) in Microsoft Exchange allows an authorized attacker to elevate privileges over a network.
CVSS v3.1
Score 9.9critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-918, involves server-side request forgery in Microsoft Exchange Online. An authorized attacker can exploit this flaw to elevate privileges within the network. The vulnerability is rated critical with a CVSS 3.1 score of 9.9, reflecting network attack vector, low attack complexity, required privileges, no user interaction, and high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to address this issue.
Potential Impact
Successful exploitation of this SSRF vulnerability can lead to privilege escalation, allowing an attacker with authorized access to gain higher privileges over the network. This can result in significant compromise of confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the vendor-provided patch promptly. Refer to the Microsoft security advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26137 for detailed remediation instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-02-11T16:24:51.133Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26137","vendor":"Microsoft"}]
Threat ID: 69bc698ce32a4fbe5ffae00d
Added to database: 03/19/2026, 21:24:28 UTC
Last enriched: 06/19/2026, 20:32:34 UTC
Last updated: 08/02/2026, 07:17:56 UTC
Views: 195
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