CVE-2026-77488
CVE-2026-77488 is a medium-severity vulnerability in Microsoft Sql Server 2017 with a CVSS 3.x base score of 5.5. 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-191.
Key facts
- Severity: Medium (CVSS 3.x base score 5.5)
- EPSS exploit prediction: 0% (32nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-191
- Affected product: Microsoft Sql Server 2017
- Published:
- Last modified:
Description
Integer underflow (wrap or wraparound) in SQL Server allows an authorized attacker to disclose information locally.
Frequently asked questions
- What is CVE-2026-77488?
- Integer underflow (wrap or wraparound) in SQL Server allows an authorized attacker to disclose information locally.
- How severe is CVE-2026-77488?
- CVE-2026-77488 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2026-77488 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-77488?
- CVE-2026-77488 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-2026-77488?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2026-77488 published?
- CVE-2026-77488 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 →
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