CVE-2026-97830
Windows Internet Information Services Denial of Service Vulnerability
CVE-2026-97830 is a high vulnerability (CVSS 7.5) in Microsoft Windows 11 Version 23h2, published October 13, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.07%, the 65th percentile. No source names a fixed version.
- Severity
- 7.5 HighCVSS 3.1, CVE List
- Exploit chance
- 1.07%EPSS, 65th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
Double free in Windows Internet Information Services allows an unauthorized attacker to deny service over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
Affected products
- microsoft windows 11 version 23h2
- microsoft windows 11 version 24h2
- microsoft windows 11 version 25h2
- microsoft windows 11 version 26h1
- microsoft windows 11 version 26h2
- microsoft windows server 2022
- microsoft windows server 2025
- microsoft windows server 2025 (server core installation)
- microsoft windows 11 23h2
- microsoft windows 11 24h2
- microsoft windows 11 25h2
- microsoft windows 11 26h1
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What each source reports
CVE List Score used
Windows Internet Information Services Denial of Service Vulnerability
Double free in Windows Internet Information Services allows an unauthorized attacker to deny service over a network.
- Record
CVE-2026-97830- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C - Weakness
- CWE-415
- Updated
- 2026-11-10
EUVDEUVD-2026-100431
Double free in Windows Internet Information Services allows an unauthorized attacker to deny service over a network.
- Record
EUVD-2026-100431- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-10
GitHub AdvisoriesGHSA-x4cr-3wgq-2jqq
Double free in Windows Internet Information Services allows an unauthorized attacker to deny...
Double free in Windows Internet Information Services allows an unauthorized attacker to deny service over a network.
- Record
GHSA-x4cr-3wgq-2jqq- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-415
- Updated
- 2026-11-02
NVD
Double free in Windows Internet Information Services allows an unauthorized attacker to deny service over a network.
- Record
CVE-2026-97830- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-415
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | CVE List, EUVD | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.