EUVD-2026-73126
GHSA-f8g7-2gfj-4v34
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Network-accessible endpoint, low complexity, requires authenticated Exchange user (PR:L); SSRF yields read-only confidentiality impact with no integrity or availability effect.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.
AnalysisAI
Server-side request forgery in Microsoft Exchange Server 2016, 2019, and Subscription Edition enables a network-authenticated low-privilege attacker to force the Exchange server to issue crafted outbound HTTP requests, resulting in high-confidentiality-impact information disclosure and network spoofing. The vulnerability requires only valid Exchange credentials and no user interaction, making it accessible to any mailbox user in an affected organization. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid Exchange account with at least mailbox-level (low-privilege) authenticated access to the affected Exchange server over the network - PR:L per the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 6.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N) accurately reflects the threat posture: low-complexity network exploitation by any authenticated user, with high confidentiality impact limited to the Exchange server's own network perspective. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to the following patched versions per the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69361: Exchange Server 2016 CU23 to version 15.01.2507.073 or later; Exchange Server 2019 CU14 to version 15.02.1544.046 or later; Exchange Server 2019 CU15 to version 15.02.1748.051 or later; Exchange Server Subscription Edition to version 15.02.2562.049 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-918 – Server-Side Request Forgery (SSRF)
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External POC / Exploit Code
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