CVE-2026-47291
What it is
Integer overflow or wraparound in Windows HTTP.sys allows an unauthorized attacker to execute code over a network.
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 25.3% chance of exploitation in the next 30 days (EPSS). Higher than most.
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 25.3% in the next 30 days (EPSS).
- Severity: 9.8 CRITICAL (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 25.3% · EPSS, next 30 days
- Weakness
- CWE-122
- Record status
- Analyzed
Affected
- Microsoft Windows 10 1607 < 10.0.14393.9234
- Microsoft Windows 10 1809 < 10.0.17763.8880
- Microsoft Windows 10 21h2 < 10.0.19044.7417
- Microsoft Windows 10 22h2 < 10.0.19045.7417
- Microsoft Windows 11 23h2 < 10.0.22631.7219
- Microsoft Windows 11 24h2 < 10.0.26100.8655
- Microsoft Windows 11 25h2 < 10.0.26200.8655
- Microsoft Windows 11 26h1 < 10.0.28000.2269
Attack profile CVSS 3.1 · 9.8
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-47291.md and follow it. Check whether this project is affected by CVE-2026-47291. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
