How severe is CVE-2025-33073?

CVE-2025-33073 has a CVSS score of 8.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2025-33073?

Affected package information for CVE-2025-33073 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2025-33073?

No fixed version has been published for CVE-2025-33073 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2025-33073 actively exploited in the wild?

Yes. There are 4 known exploit references for CVE-2025-33073, including 1 documented proof-of-concept exploit on Exploit-DB. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2025-33073?

CVE-2025-33073 has an EPSS (Exploit Prediction Scoring System) score of 44.3%, placing it in the 98th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score warrants monitoring and prompt remediation.

Is CVE-2025-33073 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2025-33073 (Microsoft Windows SMB Client Improper Access Control Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2025-10-20. CISA required all US federal civilian agencies to remediate this vulnerability by 2025-11-10. The required action was: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2025-33073?

CVE-2025-33073 is classified as CWE-284 (CWE-284). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Which products and versions are affected by CVE-2025-33073?

CVE-2025-33073 affects microsoft windows 10 21h2; microsoft windows 10 22h2; microsoft windows 10 1507; microsoft windows 10 1607, and 11 more product(s). Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2025-33073 published, and has it been updated?

CVE-2025-33073 was published on June 10, 2025 and was last updated on October 27, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2025-10-20 — agencies required to remediate by 2025-11-10

CVE-2025-33073

HIGH

Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.

Published

Jun 10, 2025

Updated

Oct 27, 2025

Affected

0 pkgs

Patched

None yet

Exploits

4 known

EPSS Exploitation Probability

via FIRST.org ↗

44.3%probability of exploitation in next 30 days

High Risk98th percentile+7.17%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.

Affected Products

15 products · 21 configurations

windows 10 21h2microsoft

< 10.0.19044.5965

range

windows 10 22h2microsoft

< 10.0.19045.5965

range

windows 10 1507microsoft

< 10.0.10240.21034

range

windows 10 1607microsoft

< 10.0.14393.8148

range

windows 10 1809microsoft

< 10.0.17763.7434

range

windows 11 22h2microsoft

< 10.0.22621.5472

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-52330remotewindows

Windows 11 SMB Client - Privilege Escalation & Remote Code Execution (RCE)

by Mohammed Idrees Banyamer · Jun 15, 2025

Exploit-DB Source

Frequently Asked Questions

Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.

O3 Security · Impact-Aware SCA

Is CVE-2025-33073 in your stack?

O3 detects CVE-2025-33073 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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