EUVD-2026-73644
GHSA-rch5-r7w5-8fc5
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Network-exploitable pre-auth deserialization with high complexity condition; full C/I/A impact consistent with arbitrary code execution in SQL Server process.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Deserialization of untrusted data in SQL Server allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution via deserialization of untrusted data in Microsoft SQL Server 2019, 2022, and 2025 allows an unauthenticated network attacker to achieve full system compromise with high complexity exploitation conditions. The vulnerability (CWE-502) exists in SQL Server's handling of serialized objects over the network, enabling attackers to trigger code execution without authentication. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The CVSS PR:N metric indicates authentication is not required prior to exploitation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 8.1 with vector AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H represents a significant severity. … 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 SQL Server to a patched servicing release on the appropriate branch: SQL Server 2019 GDR → 15.0.2190.7 or later; SQL Server 2019 CU 32 → 15.0.4490.9 or later; SQL Server 2022 GDR → 16.0.1200.5 or later; SQL Server 2022 CU 25 → 16.0.4262.2 or later; SQL Server 2022 CU 26 → 16.0.4275.2 or later; SQL Server 2025 GDR → 17.0.1135.8 or later; SQL Server 2025 CU 8 → 17.0.4085.5 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all SQL Server 2019, 2022, and 2025 instances in your environment and assess which are network-accessible, prioritizing internet-facing deployments. …
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Same weakness CWE-502 – Deserialization of Untrusted Data
View allSame technique Deserialization
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External POC / Exploit Code
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