Authenticated privilege escalation via heap overflow
Published Oct 13, 2026 · Updated Oct 13, 2026
Heap overflow in Microsoft SQL Server allows remote authenticated users to elevate privileges through network access. The public CNA record does not identify the affected routine, triggering input, or faulty buffer operation beyond the heap-overflow classification. Exploitation requires authorized access to the instance; the resulting privilege level and additional exploit conditions are not disclosed.
Summary
What happened
Heap overflow in Microsoft SQL Server allows remote authenticated users to elevate privileges through network access. The public CNA record does not identify the affected routine, triggering input, or faulty buffer operation beyond the heap-overflow classification. Exploitation requires authorized access to the instance; the resulting privilege level and additional exploit conditions are not disclosed.
The record
- CVE
- CVE-2026-68883
- Published
- Oct 13, 2026
- Updated
- Oct 13, 2026
- Vendor
- Microsoft Corporation
- Product
- Microsoft SQL Server 2022
- Classifications
- CWE-122
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 13, 2026CVE publishedPublication date reported by the CVE source.
- Oct 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=16.0.0 <16.0.1210.3
- Affected versionversion=16.0.4003.1 <16.0.4305.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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