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.
Published 2021-07-06 12:15:22
Updated 2021-09-14 14:40:56
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Overflow

Exploit prediction scoring system (EPSS) score for CVE-2021-32559

0.14%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 48 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-32559

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.0
MEDIUM AV:N/AC:L/Au:S/C:N/I:N/A:P
8.0
2.9
NIST
6.5
MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.8
3.6
NIST

CWE ids for CVE-2021-32559

  • The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-32559

Products affected by CVE-2021-32559

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