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CVE-2021-22637

25
FAUCET Score

CVE-2021-22637 is a high-severity vulnerability affecting Fujielectric Tellus Lite V-Simulator and V-Server Lite versions prior to 4.0.10.0. It involves multiple stack-based buffer overflows that can be triggered by a specially crafted project file, potentially leading to arbitrary code execution. With a CVSS score of 7.8, this vulnerability requires local access and user interaction (e.g., opening a malicious file) but could result in complete compromise of confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.0.10.0CPE matchmatch criteria
cpe:2.3:a:fujielectric:v-server:*:*:*:*:lite:*:*:*
< 4.0.10.0CPE matchmatch criteria
cpe:2.3:a:fujielectric:v-simulator:*:*:*:*:lite:*:*:*

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
2.14%
Probability of exploitation in next 30 days
EPSS Percentile
80.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0214 is in the 80th percentile among its peer group of 11,621 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

us-cert.cisa.gov / ics/advisories/icsa-21-026-01
Third Party AdvisoryUS Government Resource
zerodayinitiative.com / advisories/ZDI-21-097
Third Party AdvisoryVDB Entry