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CVE-2021-34141

21
FAUCET Score

CVE-2021-34141 describes an incomplete string comparison vulnerability in the numpy.core component of NumPy versions prior to 1.22.0, affecting various NumPy and Oracle Communications Cloud Native Core Policy products. This medium-severity vulnerability (CVSS 5.3) could allow attackers to trigger slightly incorrect data copying, resulting in a low impact on availability (A:L) without affecting confidentiality or integrity. The vendor considers this behavior "completely harmless," and there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.22.0CPE matchmatch criteria
cpe:2.3:a:numpy:numpy:*:*:*:*:*:*:*:*
22.1.3CPE matchmatch criteria
cpe:2.3:a:oracle:communications_cloud_native_core_policy:22.1.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.56%
Probability of exploitation in next 30 days
EPSS Percentile
72.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0156 is in the 56th percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (16)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 1.22.0-1
microsoftpatch availablevia msrc
Product: 18931-16820Fixed in: 1.16.6-2
microsoftpatch availablevia msrc
Product: 18932-16823Fixed in: 1.16.6-3
microsoftpatch availablevia msrc
Product: cm1 numpy 1.16.6-2 on CBL Mariner 1.0Fixed in: 1.16.6-2
microsoftpatch availablevia msrc
Product: cbl2 numpy 1.16.6-3 on CBL Mariner 2.0Fixed in: 1.16.6-3
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 1.22.0-1
oraclepatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: numpyFixed in: 1.22
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: python39:3.9/numpy
redhatvendor investigatingvia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-python38-numpy
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: numpy
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: python38:3.8/numpy
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: python27:2.7/numpy
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: inkscape:flatpak/numpy
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: numpy

Vendor Advisories (4)

microsoft2022-Jan/CVE-2021-34141

CVE-2021-34141

Jan 11, 2022
pipGHSA-fpfv-jqm9-f5jmmedium

Incorrect Comparison in NumPy

Dec 18, 2021
microsoft2021-Dec/CVE-2021-34141Moderate

An incomplete string comparison in the numpy.core component in NumPy before 1.22.0 allows attackers to trigger slightly incorrect copying by constructing specific string objects. NOTE: the vendor states that this reported code behavior is "completely harmless."

Dec 14, 2021
redhatCVE-2021-34141Low

numpy: incomplete string comparison in the numpy.core component

May 11, 2021

References

github.com / numpy/numpy/issues/18993
ExploitIssue TrackingPatchThird Party Advisory
oracle.com / security-alerts/cpujul2022.html
PatchThird Party Advisory