CVE-2026-105512
Microsoft QUIC Denial of Service Vulnerability
CVE-2026-105512 is a high vulnerability (CVSS 7.5) in Microsoft Windows 11 Version 23h2, published November 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.36%, the 72nd percentile. No source names a fixed version.
- Severity
- 7.5 HighCVSS 3.1, CVE List
- Exploit chance
- 1.36%EPSS, 72nd percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
Integer underflow (wrap or wraparound) in Microsoft QUIC 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
What each source reports
CVE List Score used
Microsoft QUIC Denial of Service Vulnerability
Integer underflow (wrap or wraparound) in Microsoft QUIC allows an unauthorized attacker to deny service over a network.
- Record
CVE-2026-105512- 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-191
- Updated
- 2026-11-10
EUVDEUVD-2026-122015
Integer underflow (wrap or wraparound) in Microsoft QUIC allows an unauthorized attacker to deny service over a network.
- Record
EUVD-2026-122015- 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
NVD
Integer underflow (wrap or wraparound) in Microsoft QUIC allows an unauthorized attacker to deny service over a network.
- Record
CVE-2026-105512- 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-191
- Updated
- 2026-11-11
History
| Recorded | Changed | Sources |
|---|---|---|
| cwes, references, severity, title | CVE List | |
| first indexed | EUVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.