CVE-2025-33073
What it is
Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.
At a glance
- Exploitability
- Can be exploited over the network with a low-privilege account. High risk of data exposure, data tampering, service disruption.
- In the wild
- CISA lists this as exploited in real attacks. Treat as urgent.
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- ReservedThe CVE id was reserved by its CNA
- PublishedDisclosed publicly on CVE.org and NVD
- 2025-10-20 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
- 2025-11-10 Remediation deadlineCISA's due date for federal agencies to fix it
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
- Exploit odds: 82.8% in the next 30 days (EPSS).
- Severity: 8.8 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Added to CISA KEV
- 2025-10-20
- Exploit probability
- 82.8% · EPSS, next 30 days
- Weakness
- CWE-284 · Improper access control
- Record status
- Analyzed
Affected
- Microsoft Windows 10 1507 < 10.0.10240.21034
- Microsoft Windows 10 1607 < 10.0.14393.8148
- Microsoft Windows 10 1809 < 10.0.17763.7434
- Microsoft Windows 10 21h2 < 10.0.19044.5965
- Microsoft Windows 10 22h2 < 10.0.19045.5965
- Microsoft Windows 11 22h2 < 10.0.22621.5472
- Microsoft Windows 11 23h2 < 10.0.22631.5472
- Microsoft Windows 11 24h2 < 10.0.26100.4270
Attack profile CVSS 3.1 · 8.8
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:N/AC:L/PR:L/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-2025-33073.md and follow it. Check whether this project is affected by CVE-2025-33073. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-33073
- https://www.vicarius.io/vsociety/posts/cve-2025-33073-mitigation-script-improper-access-control-in-windows-smb-affects-microsoft-products
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-33073
- https://www.vicarius.io/vsociety/posts/cve-2025-33073-detection-script-improper-access-control-in-windows-smb-affects-microsoft-products
- https://www.vicarius.io/vsociety/posts/cve-2025-33073-mitigation-script-improper-access-control-in-windows-smb-affects-microsoft-products
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-33073