8.8

CVE-2025-33073: Microsoft Windows SMB Client Improper Access Control Vulnerability

KEV
Analyzed
AliasesopenSUSE-SU-2026:10837-1
Published 10-06-2025Last modified 26-02-2026

Vulnerability summary

CVE-2025-33073 is a high (CVSS 8.8) Improper Access Control vulnerability in Microsoft Windows. It is known to be exploited: CISA lists it, first on 20-10-2025. EPSS estimates a 82.70% chance of exploitation in the next 30 days, higher than 99.6% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Act nowlisted as exploited

Listed as exploited by CISA (20-10-2025)

Source freshness unavailable

How is this decided?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
82.70%
0%100%
Critical · 0.00 pp in 30 days
KEVExploited in the wildCritical · listed in 1 catalog
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1exploit-database

Timeline

  1. 10-06-2025
    PublishedVulnerability first disclosed.
  2. 20-10-2025
    Added to CISA KEVExploitedMicrosoft Windows SMB Client Improper Access Control Vulnerability
  3. 10-11-2025
    CISA remediation dueDeadline passedApply mitigations per vendor instructions.
  4. 26-02-2026
    Last modifiedVulnerability information updated.

Description

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

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

82.70%

Chance of exploitation in the next 30 days

Percentile

100%

Versus all other CVEs

30-day change

No change 0.00 pp

From 82.70% on 05-10-2026

05-10-202604-11-2026

Known exploited

Compare KEV catalogs
CISA KEVListed
Added
20-10-2025
Federal due date
10-11-2025
ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

CISA required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-33073 nvd.nist.gov/vuln/detail/CVE-2025-33073

Public exploits

1 found
  • exploit-databaseremotewindowsUnverified

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

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Microsoft35 products
Opensuse1 product
  • python-impacket&distro=openSUSE Tumbleweed< 0.13.1-1.1

2 vendors · 36 products

References

5 links