CVE-2021-32559
MEDIUM
6.5
CVSS Score
Published: July 6, 2021 at 11:35 AM UTC
Updated: June 17, 2026 at 03:53 AM UTC
1 product affected across 1 vendorPYWIN32
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Severity
MEDIUM6.5
Exploit prediction
EPSS 2%
Description
An integer overflow exists in pywin32 prior to version b301 when adding an access control entry (ACE) to an access control list (ACL) that would cause the size to be greater than 65535 bytes. An attacker who successfully exploited this vulnerability could crash the vulnerable process.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 301
Affected range stops below 301, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (4)
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/fireeye/Vulnerability-Disclosures/blob/master/FEYE-2021-0017/FEYE-2021-0017.mdx_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/mhammond/pywin32/issues/1700x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/mhammond/pywin32/pull/1701x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/mhammond/pywin32/releasesCVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusANALYZED
CWE
CWE-190
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