CVE-2025-33073
Windows SMB Client Elevation of Privilege Vulnerability
CVE-2025-33073 is a high vulnerability (CVSS 8.8) in Microsoft Windows, published June 10, 2025. CISA lists it as known to be exploited, since October 20, 2025. EUVD reports exploitation since October 20, 2025. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 82.8%, the 99th percentile. Fixed in python-impacket 0.13.1-1.1.
- Severity
- 8.8 HighCVSS 3.1, CVE List
- Exploit chance
- 82.8%EPSS, 99th percentile
- Exploitation
- ExploitedCISA KEV,
- Fixed in
0.13.1-1.1python-impacket
Description
Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
Discussion
Affected products
- microsoft windows
- microsoft windows 10 version 1507
- microsoft windows 10 version 1607
- microsoft windows 10 version 1809
- microsoft windows 10 version 21h2
- microsoft windows 10 version 22h2
- microsoft windows 11 version 22h2
- microsoft windows 11 version 22h3
- microsoft windows 11 version 23h2
- microsoft windows 11 version 24h2
- microsoft windows server 2008 r2 service pack 1
- microsoft windows server 2008 r2 service pack 1 (server core installation)
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- microsoft windows server 2008 service pack 2
- microsoft windows server 2008 service pack 2 (server core installation)
- microsoft windows server 2012
- microsoft windows server 2012 (server core installation)
- microsoft windows server 2012 r2
- microsoft windows server 2012 r2 (server core installation)
- microsoft windows server 2016
- microsoft windows server 2016 (server core installation)
- microsoft windows server 2019
- microsoft windows server 2019 (server core installation)
- microsoft windows server 2022
- microsoft windows server 2022, 23h2 edition (server core installation)
- microsoft windows server 2025
- microsoft windows server 2025 (server core installation)
- microsoft windows 10 1507
- microsoft windows 10 1607
- microsoft windows 10 1809
- microsoft windows 10 21h2
- microsoft windows 10 22h2
- microsoft windows 11 22h2
- microsoft windows 11 23h2
- microsoft windows 11 24h2
- microsoft windows server 2008
- microsoft windows server 2022 23h2
Affected packages
| Package | Affected | Fixed |
|---|---|---|
python-impacketopenSUSE:Tumbleweed | before 0.13.1-1.1 | 0.13.1-1.1 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | mverschu/CVE-2025-33073 | 2025-06-13 |
| Exploit-DB | Windows 11 SMB Client - Privilege Escalation & Remote Code Execution (RCE) | 2025-06-15 |
| PoC in GitHub | starscow/CVE-2025-33073 | 2025-06-17 |
| PoC in GitHub | obscura-cert/CVE-2025-33073 | 2025-06-28 |
| PoC in GitHub | matejsmycka/CVE-2025-33073-checker | 2025-07-31 |
| PoC in GitHub | cve-2025-33073/cve-2025-33073 | 2025-09-06 |
| PoC in GitHub | SFRDevelopment/windows-smb-vulnerability-framework-cve-2025-33073 | 2025-10-18 |
| PoC in GitHub | uziii2208/CVE-2025-33073 | 2025-11-14 |
| PoC in GitHub | irjfifndn-prog/Blackash-CVE-2025-33073 | 2025-11-17 |
| PoC in GitHub | EgCupCake/cupntlm-Automated-Exploit-For-CVE-2025-33073- | 2026-03-09 |
| PoC in GitHub | IyarGross/SMB-CVE-2025-33073 | 2026-03-11 |
What each source reports
CVE List Score used
Windows SMB Client Elevation of Privilege Vulnerability
Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.
- Record
CVE-2025-33073- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C - Weakness
- CWE-284
- Updated
- 2026-11-02
EUVDEUVD-2025-17737
Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.
- Record
EUVD-2025-17737- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-cfjg-2jr6-cgph
Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a...
Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.
- Record
GHSA-cfjg-2jr6-cgph- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-284
- Updated
- 2026-11-02
CISA KEVNo score
Microsoft Windows SMB Client Improper Access Control Vulnerability
Microsoft Windows SMB Client contains an improper access control vulnerability that could allow for privilege escalation. An attacker could execute a specially crafted malicious script to coerce the victim machine to connect back to the attack system using SMB and authenticate.
- Record
CVE-2025-33073- Weakness
- CWE-284
- Updated
- 2026-11-02
NVD
Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.
- Record
CVE-2025-33073- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-284
- Updated
- 2026-11-02
OSVopenSUSE-SU-2026:10837-1No score
python311-impacket-0.13.1-1.1 on GA media
These are all security issues fixed in the python311-impacket-0.13.1-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2026:10837-1- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| exploits | PoC in GitHub | |
| exploitation, exploits | ||
| first indexed | CVE List, EUVD, Exploit-DB, GitHub Advisories, CISA KEV, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
msrc.microsoft.com/update-guide/vulnerability/CVE-2025-33073
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-33073
vicarius.io/vsociety/posts/cve-2025-33073-detection-script-improper-access-control-in-windows-smb-affects-microsoft-products
nvd.nist.gov/vuln/detail/CVE-2025-33073
github.com/advisories/GHSA-cfjg-2jr6-cgph
suse.com/security/cve/CVE-2025-33073