PatchTheCVECVE-2026-88123: Out-of-bounds read in DNS Server allows an authorized attacker to deny service over a network.
CVE-2026-88123 is a medium-severity flaw (CVSS 6.5) affecting windows server 2012, windows server 2016, windows server 2019. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Out-of-bounds read in DNS Server allows an authorized attacker to deny service over a network.
Why this priority
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 1.2% (top 31%) |
| CISA exploited list | No |
| Weakness | CWE-125 |
| Published | 2026-10-13 |
| Last modified | 2026-10-16 |
Last updated 2026-10-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-88123?
windows server 2012: mitigate or apply the listed mitigation; windows server 2016: upgrade to 10.0.14393.9612; windows server 2019: upgrade to 10.0.17763.9376. Exact commands for each OS are on this page.
Is CVE-2026-88123 being exploited?
CVE-2026-88123 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-88123 affect?
CVE-2026-88123 affects windows server 2012, windows server 2016, windows server 2019. Severity is medium (CVSS 6.5). Out-of-bounds read in DNS Server allows an authorized attacker to deny service over a network.
How urgent is CVE-2026-88123?
Priority 45/100. On your watchlist
Software pages
Windows vulnerabilities · Windows Server vulnerabilities
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