CVE-2026-88129
Microsoft — Role: DNS Server Denial of Service Vulnerability
Patch Tuesday
What EVULNABLE says
An EPSS probability of 0.011, and CVSS base score 6.5.
Scheduled Maintenance
The priority band answers “how soon”, not “how bad” — see Methodology for what it weighs and where it abstains.
The evidence behind it
| Measure | Value | Source | What it means |
|---|---|---|---|
| CVSS base score | 6.5 | — | How severe the flaw is in itself. It does not say how likely an attack is. |
| FIRST EPSS | 0.011 (64.8th pctl) | FIRST | FIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. |
| Actively exploited | Not confirmed | Patch Tuesday | Whether a source of record has confirmed attacks using it in the wild. |
| Fixed in | windows server 2016: update to 10.0.14393.9612 or later | windows server 2019: update to 10.0.17763.9376 or later | windows server 2022: update to 10.0.20348.5761 or later | windows server 2025: update to 10.0.26100.33650 or later | NVD | The version(s) the vendor has published as fixed, where NVD records one. |
| Public exploit module | None known | Metasploit | Module existing is not the same as active exploitation. |
| EUVD cross-reference | Listed | ENISA EUVD | ENISA's own vulnerability database entry for this CVE, where one exists. |
Impacted software or hardware
- windows server 2012 Operating system — r2
- windows server 2016 Operating system — < 10.0.14393.9612
- windows server 2019 Operating system — < 10.0.17763.9376
- windows server 2022 Operating system — < 10.0.20348.5761
- windows server 2025 Operating system — < 10.0.26100.33650
Fixed versions: windows server 2016: update to 10.0.14393.9612 or later | windows server 2019: update to 10.0.17763.9376 or later | windows server 2022: update to 10.0.20348.5761 or later | windows server 2025: update to 10.0.26100.33650 or later
Remediation: Update the affected product(s) to a fixed version: windows server 2016: update to 10.0.14393.9612 or later | windows server 2019: update to 10.0.17763.9376 or later | windows server 2022: update to 10.0.20348.5761 or later | windows server 2025: update to 10.0.26100.33650 or later.
Remediation basis: NVD CPE version data
ENISA EUVD also lists this CVE at CVSS 6.5 (v3.1), assigned by microsoft. Source: euvd.enisa.europa.eu.
2 days recorded, 2026-10-14 to 2026-10-15
1.09% as of 2026-10-15 (64.7th percentile). FIRST EPSS, recorded daily since this page started tracking it.
2026-10-14
2026-10-15
The primary records
This page is an opinion about urgency. Where it and a source of record disagree, the source of record is the record.
Where this sits
CVE-2026-88129 is one of the entries ranked on the priority feed and in this month's Microsoft release.