CVE-2021-32559

mediumpriority · track · 27EPSS 0.017 · 77 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.73% (77th) EPSS

CVSS 4 · medium

Is it mine?

7 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04mediumAV:N/AC:L/Au:S/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8 · impact 2.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.16.5mediumAV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-190USprimaryCWE-190USCWE-190US

affected products (7)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
Splunk Inc. Splunk Enterprise9.0.0 → 9.0.9fstec_bduRU
Splunk Inc. Splunk Enterprise9.1.0 → 9.1.4fstec_bduRU
Splunk Inc. Splunk Enterprise9.2.0 → 9.2.1fstec_bduRU
Сообщество свободного программного обеспечения pywin32≤ 301fstec_bduRU
mhammond pywin32< 301nvdUScpe:2.3:a:mhammond:pywin32:*:*:*:*:*:*:*:*
PyPI pywin32< 301osvUSpkg:pypi/pywin32

advisories (2)

Vendor and ecosystem advisories describing this.

GHSA-hwfp-hg2m-9vr2Integer overflow in pywin322021-08-09ghsa · osvUS
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.
PYSEC-2021-1122021-07-06vendor · osvUS
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.

also known as (7)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu osv nvd NVD CVE.org MITRE

published 2021-07-06modified 2026-06-17

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+4644 more

references (16)

External citations — patches, advisories, analysis.

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