EUVD-2026-73124
GHSA-q6cf-r5wm-3jxw
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network exploitable with low-privilege credentials, no interaction, and full C/I/A impact consistent with code execution in a privileged Exchange service context.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
External control of file name or path in Microsoft Exchange Server allows an authorized attacker to execute code over a network.
AnalysisAI
Remote code execution in Microsoft Exchange Server allows a low-privileged authenticated network attacker to execute arbitrary code by supplying externally controlled file paths (CWE-73). Affected are Exchange Server 2016 CU23, 2019 CU14/CU15, and the Subscription Edition RTM release lines, all prior to their respective July 2026 patch levels. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid, low-privilege Exchange account - any authenticated mailbox user can potentially trigger the vulnerability; no administrative rights are needed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 (High) score reflects network reachability, low complexity, low authentication bar, and full C/I/A impact - a credible combination for on-premises Exchange. … 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 | Vendor-released patches are available for all affected Exchange Server versions. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Microsoft Exchange Server deployments, documenting versions (2016, 2019, Subscription Edition) and current patch levels against Microsoft's July 2026 security advisories. …
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Same weakness CWE-73 – External Control of File Name or Path
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External POC / Exploit Code
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