How severe is CVE-2026-67379?

CVE-2026-67379 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-67379 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-67379?

CVE-2026-67379 primarily affects Microsoft Sql Server 2019. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-67379?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-67379 published?

CVE-2026-67379 was published on 2026-09-08 and last updated on 2026-09-16.

CVE-2026-67379

CVE-2026-67379 is a high-severity vulnerability in Microsoft Sql Server 2019 with a CVSS 3.x base score of 8.5. 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-121.

Key facts

Severity: High (CVSS 3.x base score 8.5)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-121
Affected product: Microsoft Sql Server 2019
Published: 2026-09-08
Last modified: 2026-09-16

Description

Stack-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.

Frequently asked questions

What is CVE-2026-67379?: Stack-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.
How severe is CVE-2026-67379?: CVE-2026-67379 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-67379 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-67379?: CVE-2026-67379 primarily affects Microsoft Sql Server 2019. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-67379?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-67379 published?: CVE-2026-67379 was published on 2026-09-08 and last updated on 2026-09-16.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67379

Affected products (3)

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 2019

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.
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.

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