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CVE-2021-23338

24
FAUCET Score

CVE-2021-23338 is a high-severity vulnerability affecting all versions of the Microsoft Qlib package. It stems from the unsafe use of a YAML load function within Qlib's command-line interface workflow, specifically CWE-502. An attacker with high privileges can exploit this over a network with low complexity, leading to high impacts on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:microsoft:qlib:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.6MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.7
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.55%
Probability of exploitation in next 30 days
EPSS Percentile
88.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0355 is in the 87th percentile among its peer group of 5,531 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: pyqlibFixed in: 0.7.0

Vendor Advisories (1)

pipGHSA-hjr4-fhgp-23g9medium

qlib Deserialization of Untrusted Data vulnerability

May 24, 2022

References

github.com / 418sec/huntr/pull/1329
ExploitPatchThird Party Advisory
snyk.io / vuln/SNYK-PYTHON-QLIB-1054635
Third Party Advisory