CVE-2026-67390
CVE-2026-67390 is a medium-severity vulnerability in Microsoft Sql Server 2017 with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-126.
Key facts
- Severity: Medium (CVSS 3.x base score 6.5)
- EPSS exploit prediction: 1% (61st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-126
- Affected product: Microsoft Sql Server 2017
- Published:
- Last modified:
Description
Buffer over-read in SQL Server allows an authorized attacker to disclose information over a network.
Frequently asked questions
- What is CVE-2026-67390?
- Buffer over-read in SQL Server allows an authorized attacker to disclose information over a network.
- How severe is CVE-2026-67390?
- CVE-2026-67390 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2026-67390 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-67390?
- CVE-2026-67390 primarily affects Microsoft Sql Server 2017. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2026-67390?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2026-67390 published?
- CVE-2026-67390 was published on 2026-09-08 and last updated on 2026-09-15.
References
Affected products (4)
- cpe:2.3:a:microsoft:sql_server_2017:*:*:*:*:*:*:x64:*
- cpe:2.3:a:microsoft:sql_server_2019:*:*:*:*:*:*:x64:*
- cpe:2.3:a:microsoft:sql_server_2022:*:*:*:*:*:*:x64:*
- cpe:2.3:a:microsoft:sql_server_2025:*:*:*:*:*:*:x64:*
More vulnerabilities in Microsoft Sql Server 2017
- CVE-2026-67631 — Critical (CVSS 9.8): Heap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.
- CVE-2026-54118 — Critical (CVSS 9.8): Deserialization of untrusted data in SQL Server allows an unauthorized attacker to execute code over a network.
- CVE-2026-54117 — Critical (CVSS 9.8): Deserialization of untrusted data in SQL Server allows an unauthorized attacker to execute code over a network.
- CVE-2026-78442 — High (CVSS 8.8): Heap-based buffer overflow in Windows OLE DB allows an unauthorized attacker to execute code over a network.
- CVE-2026-77487 — High (CVSS 8.8): Improper access control in SQL Server allows an authorized attacker to elevate privileges over a network.
- CVE-2026-77486 — High (CVSS 8.8): Integer overflow or wraparound in SQL Server allows an unauthorized attacker to execute code over a network.
All CVEs affecting Microsoft Sql Server 2017 →
Other CWE-126 (Buffer Over-read) vulnerabilities
- CVE-2023-36397 — Critical (CVSS 9.8): Windows Pragmatic General Multicast (PGM) Remote Code Execution Vulnerability
- CVE-2025-12106 — Critical (CVSS 9.1): Insufficient argument validation in OpenVPN 2.7_alpha1 through 2.7_rc1 allows an attacker to trigger a heap buffer…
- CVE-2023-51773 — Critical (CVSS 9.1): BACnet Stack before 1.3.2 has a decode function APDU buffer over-read in bacapp_decode_application_data in bacapp.c.
- CVE-2021-34584 — Critical (CVSS 9.1): Crafted web server requests can be utilised to read partial stack or heap memory or may trigger a denial-of- service…
- CVE-2025-36855 — High (CVSS 8.8): A vulnerability ( CVE-2025-21176 https://www.cve.org/CVERecord ) exists in DiaSymReader.dll due to buffer over-read.…
- CVE-2025-21176 — High (CVSS 8.8): .NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability