Microsoft SQL Server: Information disclosure via uninitialized resource
Summary
Microsoft SQL Server 2025 contains a flaw in which a resource is used before it is initialized (CWE-908). An authorized attacker with a low-privilege database login can reach the vulnerable code over the network and read information they should not see, such as leftover memory contents. Microsoft has not published technical details, and the attack needs a valid account.
Affected
- Microsoft SQL Server 2025 CU10 (x64): 17.0.4006.0 to before 17.0.5045.3
- Microsoft SQL Server 2025 RTM GDR (x64): 17.0.1050.2 to before 17.0.1155.3
- Other SQL Server branches: Unknown. Not confirmed in the sources.
Fixed in
- SQL Server 2025 CU10 GDR: build 17.0.5045.3 (KB5129299)
- SQL Server 2025 RTM GDR: build 17.0.1155.3 (KB5132748)
- Check the KB prerequisites before installing. A known issue in KB5129299 can cause access violations in queries against sys.dm_exec_requests while a database is recovering.
Workaround
- No vendor-documented workaround specific to this CVE. Apply the update.
- General hardening from Microsoft: enable encryption with Extended Protection.
Exploitation
- Not exploited in the wild and not publicly disclosed, according to Microsoft's advisory data.
- No public proof of concept found.
- Not listed in the CISA KEV catalog. CISA SSVC: exploitation none, not automatable, partial technical impact.
Our recommendation
- Install the November 2026 GDR or cumulative update for SQL Server 2025 (KB5129299 or KB5132748) in the normal patch cycle, or sooner if the server is reachable from untrusted networks.
- Check whether any SQL Server 2025 instance is exposed to the internet, the LAN or VPN users, and restrict access to it.
- Review database accounts and remove unused or weak logins.
- Plan for the recovery-related known issue during restores and failover.
Information from Microsoft (Patch Tuesday November 2026)
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Response Center: CVE-2026-68783 msrc.microsoft.com
- Microsoft KB5129299: SQL Server 2025 CU10 GDR (November 2026) support.microsoft.com
- Strix: CVE-2026-68783 www.strix.ai
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 11 Nov 2026, 11:57.
Original description (NVD)
Use of uninitialized resource in SQL Server allows an authorized attacker to disclose information over a network.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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