CVE-2021-33783
MediumCVSS 6.5Exploitation Probability (EPSS)
High risk84th percentile - higher than 84% of all known CVEs
Summary
Information disclosure vulnerability in Windows SMB. Could allow access to sensitive data transmitted over SMB.
Risk Assessment
Risk of sensitive data leakage during SMB communication in the network.
Recommendation
Install security updates for Windows SMB.
Other vulnerabilities in Windows SMB
See all- CVE-2025-33073HighActively exploited
Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.
- CVE-2026-58531High
A race condition exists in Windows SMB during concurrent execution using a shared resource. An authenticated attacker can elevate privileges over the network.
- CVE-2026-50690Medium
Use of an uninitialized resource in Windows SMB allows an authorized attacker to disclose information locally.
- CVE-2026-54997Medium
A vulnerability in Windows SMB allows an authorized attacker to disclose information locally by using an uninitialized resource.
- CVE-2026-49801Medium
Use of uninitialized resource in Windows SMB allows an authorized attacker to disclose information locally.
- CVE-2021-36974High
Vulnerability in Windows SMB allows elevation of privilege. An attacker could exploit this flaw to gain higher privileges on the system.
- CVE-2021-36972Medium
Information disclosure vulnerability in Windows SMB. It may allow an attacker to access information that should be protected.
- CVE-2021-36960High
Information disclosure vulnerability in Windows SMB. Could lead to data exposure.
Original NVD description (English source)
Windows SMB Information Disclosure Vulnerability
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

