CVE-2021-3572

A flaw was found in python-pip in the way it handled Unicode separators in git references. A remote attacker could possibly use this issue to install a different revision on a repository. The highest threat from this vulnerability is to data integrity. This is fixed in python-pip version 21.1.

Published: 2021-11-10 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-3572 is rated Low Risk (39/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.24%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-3572

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.58% 0.24% -0.34%
2 2025-11-18 0.23% 0.58% +0.35%
3 2025-03-30 — 0.23% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-3572

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.7 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 2.1 3.6 [email protected]
3.5 2.0 LOW
AV:N/AC:M/Au:S/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 6.8 2.9 [email protected]

Weakness enumeration for CVE-2021-3572

GitHub Security Advisory for CVE-2021-3572

OS Trackers for CVE-2021-3572

vendor priority summary link
debian not yet assigned CVE-2021-3572 not yet assigned priority: Debian including 1 source packages (python-pip), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2021-3572
redhat low — https://access.redhat.com/security/cve/CVE-2021-3572
suse medium CVE-2021-3572 severity moderate: SUSE including 573 source package names (0.0.17-1.1:libpython3_6m1_0-3.6.15-150300.10.21.1, 0.0.17-1.1:python3-3.6.15-150300.10.21.1, …), 2317 product×package rows across 435 product lines (Container bci/bci-base-fips, Container bci/bci-sle15-kernel-module-devel, … (435 product lines)): Fixed 2118, Known Affected 181, Known Not Affected 18. https://www.suse.com/security/cve/CVE-2021-3572/
ubuntu low CVE-2021-3572 low priority: Ubuntu including 1 source packages (python-pip), 11 status rows across 11 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, trusty, upstream, xenial): not-affected 5, released 4, ignored 2. https://ubuntu.com/security/CVE-2021-3572

Affected software / configurations for CVE-2021-3572

Vendor Product Version Raw CPE
pypa pip < 21.1 cpe:2.3:a:pypa:pip:*:*:*:*:*:*:*:*
oracle agile_plm 9.3.6 cpe:2.3:a:oracle:agile_plm:9.3.6:*:*:*:*:*:*:*
oracle communications_cloud_native_core_network_function_cloud_native_environment 1.10.0 cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:*
oracle communications_cloud_native_core_network_function_cloud_native_environment 22.1.0 cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:22.1.0:*:*:*:*:*:*:*
oracle communications_cloud_native_core_policy 1.15.0 cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.15.0:*:*:*:*:*:*:*
oracle communications_cloud_native_core_policy 22.1.3 cpe:2.3:a:oracle:communications_cloud_native_core_policy:22.1.3:*:*:*:*:*:*:*

References for CVE-2021-3572

cvelogic Threat Intelligence