CVE-2026-66816
CVE-2026-66816 is a medium-severity vulnerability in Microsoft Sql Server 2022 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-778.
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-778
- Affected product: Microsoft Sql Server 2022
- Published:
- Last modified:
Description
Insufficient logging in SQL Server allows an authorized attacker to bypass a security feature over a network.
Frequently asked questions
- What is CVE-2026-66816?
- Insufficient logging in SQL Server allows an authorized attacker to bypass a security feature over a network.
- How severe is CVE-2026-66816?
- CVE-2026-66816 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-2026-66816 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-2026-66816?
- CVE-2026-66816 primarily affects Microsoft Sql Server 2022. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2026-66816?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2026-66816 published?
- CVE-2026-66816 was published on 2026-09-08 and last updated on 2026-09-16.
References
Affected products (2)
- cpe:2.3:a:microsoft:sql_server_2022:*:*:*:*:*:*:x64:*
- cpe:2.3:a:microsoft:sql_server_2025:*:*:*:*:*:*:x64:*
More vulnerabilities in Microsoft Sql Server 2022
- CVE-2026-67643 — Critical (CVSS 9.8): Heap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.
- 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-2026-67636 — Critical (CVSS 9.0): Out-of-bounds read in SQL Server allows an unauthorized attacker to execute code over a network.
- CVE-2026-67378 — Critical (CVSS 9.0): Untrusted pointer dereference in SQL Server allows an unauthorized attacker to execute code over a network.
All CVEs affecting Microsoft Sql Server 2022 →
Other CWE-778 vulnerabilities
- CVE-2024-48967 — Critical (CVSS 10.0): The ventilator and the Service PC lack sufficient audit logging capabilities to allow for detection of malicious…
- CVE-2026-76208 — High (CVSS 8.2): phpMyFAQ versions 3.1.0 through 4.1.6 contain an authentication bypass vulnerability in AuthLdap::create(). When LDAP…
- CVE-2021-43419 — High (CVSS 7.5): An Information Disclosure vulnerability exists in Opay Mobile application 1.5.1.26 and maybe be higher in the logcat…
- CVE-2019-7613 — High (CVSS 7.5): Winlogbeat versions before 5.6.16 and 6.6.2 had an insufficient logging flaw. An attacker able to inject certain…
- CVE-2019-19277 — Medium (CVSS 6.5): A vulnerability has been identified in SIPORT MP (All versions < 3.1.4). Vulnerable versions of the device allow the…
- CVE-2020-37268 — Medium (CVSS 6.3): Print Assumptions does not report that a definition was produced while universe checking was disabled when that…