CVE-2026-88089: microsoft microsoft sql server 2017 for x64-based systems (cu31) Heap-based Buffer Overflow
CVSS: 6.7v3.1MediumAwaiting analysis
Published 13-10-2026Last modified 16-10-2026
Vulnerability summary
CVE-2026-88089 is a medium (CVSS 6.7) Heap-based Buffer Overflow vulnerability in microsoft microsoft sql server 2017 for x64-based systems (cu31). EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 13.9% of scored vulnerabilities.
CVSS score
6.7/10
010
Medium · v3.1 (CVE.org)EPSS score
0.24%
0%100%
Low · Change unavailableKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 13-10-2026PublishedVulnerability first disclosed.
- 16-10-2026Last modifiedVulnerability information updated.
Description
Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code locally.
CVSS metrics
2 scores · 2 sources · 1 versionMedium 6.7Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST6.7MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.24%
Chance of exploitation in the next 30 days
Percentile
14%
Versus all other CVEs
30-day change
Change unavailable
Change unavailable
14-10-202619-10-2026
EPSS score0.24%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
- CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Affected systems
Microsoft9 products
- microsoft sql server 2017 for x64-based systems (cu31)≥ 14.0.3006.16, < 14.0.3560.2
- microsoft sql server 2017 (gdr)≥ 14.0.0, < 14.0.2140.2
- microsoft sql server 2019 for x64-based systems (cu32)≥ 15.0.4003.23, < 15.0.4500.2
- microsoft sql server 2019 (gdr)≥ 15.0.0, < 15.0.2200.2
- microsoft sql server 2022 for x64-based systems (cu27)≥ 16.0.4003.1, < 16.0.4305.5
1 vendor · 9 products
