A crucial info disclosure vulnerability in Microsoft SQL Server, designated as CVE-2025-49719, permits unauthorized attackers to entry delicate information over community connections.
This vulnerability stems from improper enter validation inside SQL Server’s processing mechanisms, enabling attackers to reveal uninitialized reminiscence contents with out requiring authentication or consumer interplay.
Key Takeaways1. Important SQL Server bug (CVE-2025-49719) exposes delicate information as a consequence of improper enter validation.2. Exploitable over the community, affecting SQL Server 2016–2022 with no authentication wanted.3. Microsoft has launched important safety patches speedy updates are strongly suggested.4. Attackers could entry uninitialized reminiscence, leaking confidential database info.
The vulnerability impacts a number of SQL Server variations from 2016 via 2022, with safety updates launched on July 8, 2025, to handle this vital safety concern.
SQL Server Info Disclosure Vulnerability (CVE-2025-49719)
The CVE-2025-49719 vulnerability is assessed beneath CWE-20: Improper Enter Validation, representing a elementary flaw in how SQL Server processes incoming community requests.
The vulnerability carries a CVSS 3.1 base rating of seven.5 with a temporal rating of 6.5, categorizing it as “Essential” severity.
The technical weak point permits attackers to take advantage of inadequate enter validation routines, doubtlessly accessing uninitialized reminiscence areas which will comprise delicate database info, connection strings, or different confidential information constructions.
The vulnerability’s assault vector traits make it significantly regarding for enterprise environments.
The CVSS vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N signifies network-based assaults with low complexity, requiring no privileges or consumer interplay.
This configuration permits distant attackers to doubtlessly extract delicate info from SQL Server cases uncovered to community entry, making it a first-rate goal for automated exploitation instruments and reconnaissance actions.
The exploitation mechanism leverages network-based assault vectors that require no authentication credentials or consumer interplay, considerably decreasing the barrier for profitable assaults.
Attackers can craft malicious community packets focusing on SQL Server’s enter validation routines, doubtlessly triggering the disclosure of uninitialized reminiscence contents.
The vulnerability’s community accessibility signifies that any SQL Server occasion reachable over TCP/IP connections may very well be susceptible to info disclosure assaults.
The exploitability evaluation signifies that whereas the vulnerability has been publicly disclosed, energetic exploitation stays “Much less Probably” in accordance with Microsoft’s evaluation.
Nevertheless, the mixture of community accessibility and no authentication necessities creates a considerable assault floor for menace actors.
Organizations working SQL Server in cloud environments, significantly Home windows Azure IaaS deployments, face further publicity dangers because of the broader community assault floor inherent in cloud infrastructure.
Threat FactorsDetailsAffected ProductsMicrosoft SQL Server 2016, 2017, 2019, 2022 (all supported variations; varied GDR/CU builds)ImpactInformation DisclosureExploit PrerequisitesNo authentication or consumer interplay requiredCVSS 3.1 Score7.5 (Excessive)
Remediation
Microsoft has launched complete safety updates addressing CVE-2025-49719 throughout all supported SQL Server variations.
The remediation technique entails making use of version-specific updates, together with each Basic Distribution Launch (GDR) and Cumulative Replace (CU) packages.
Important updates embody KB 5058721 for SQL Server 2022 CU19+GDR (model 16.0.4200.1), KB 5058722 for SQL Server 2019 CU32+GDR (model 15.0.4435.7), and KB 5058714 for SQL Server 2017 CU31+GDR (model 14.0.3495.9).
Organizations should prioritize speedy patch deployment, significantly for internet-facing SQL Server cases.
Database directors ought to implement community segmentation and entry controls as further protecting measures whereas coordinating replace deployment throughout enterprise environments.
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