What’s Vulnerable › Vulnerabilities

CVE-2021-22639

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-01-27 · updated 2026-06-17
• Weakness: CWE-824

Description

An uninitialized pointer issue has been identified in the way the application processes project files, allowing an attacker to craft a special project file that may allow arbitrary code execution on the Tellus Lite V-Simulator and V-Server Lite (versions prior to 4.0.10.0).

Affected products

• Fuji Electric V-Server Lite: before 4.0.10.0 — fixed in 4.0.10.0
• Fujielectric V-Simulator: before 4.0.10.0 — fixed in 4.0.10.0

How to fix

Upgrade to a fixed version: Fuji Electric V-Server Lite 4.0.10.0; Fujielectric V-Simulator 4.0.10.0. Check the vendor advisory for mitigations.

References

• https://us-cert.cisa.gov/ics/advisories/icsa-21-026-01
• https://www.zerodayinitiative.com/advisories/ZDI-21-098/
• https://us-cert.cisa.gov/ics/advisories/icsa-21-026-01
• https://www.zerodayinitiative.com/advisories/ZDI-21-098/

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