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CVE-2021-23138

29
FAUCET Score

CVE-2021-23138 is a high-severity stack-based buffer overflow vulnerability affecting WECON LeviStudioU versions 2019-09-21 and prior. This flaw could allow an unauthenticated attacker to remotely execute code on affected systems, given user interaction. While the CVSS score is 7.8 (High), there is no evidence of active exploitation, nor are there publicly available exploit modules or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2019-09-21CPE matchmatch criteria
cpe:2.3:a:we-con:levistudiou:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
9.29%
Probability of exploitation in next 30 days
EPSS Percentile
94.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0929 is in the 94th percentile among its peer group of 11,617 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisa.gov / uscert/ics/advisories/icsa-21-355-03
Third Party AdvisoryUS Government Resource
zerodayinitiative.com / advisories/ZDI-22-129
Third Party AdvisoryVDB Entry
zerodayinitiative.com / advisories/ZDI-22-131
Third Party AdvisoryVDB Entry
zerodayinitiative.com / advisories/ZDI-22-133
Third Party AdvisoryVDB Entry
zerodayinitiative.com / advisories/ZDI-22-134
Third Party AdvisoryVDB Entry
zerodayinitiative.com / advisories/ZDI-22-135
Third Party AdvisoryVDB Entry
zerodayinitiative.com / advisories/ZDI-22-136
Third Party AdvisoryVDB Entry
zerodayinitiative.com / advisories/ZDI-22-137
Third Party AdvisoryVDB Entry
zerodayinitiative.com / advisories/ZDI-22-138
Third Party AdvisoryVDB Entry
zerodayinitiative.com / advisories/ZDI-22-139
Third Party AdvisoryVDB Entry
zerodayinitiative.com / advisories/ZDI-22-140
Third Party AdvisoryVDB Entry
zerodayinitiative.com / advisories/ZDI-22-141
Third Party AdvisoryVDB Entry
zerodayinitiative.com / advisories/ZDI-22-142
Third Party AdvisoryVDB Entry