CVE-2021-38421: Fuji Electric Tellus Lite V-Simulator out of bounds read

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-12-20 · updated 2026-06-17
Weakness: CWE-125

Description

Fuji Electric V-Server Lite and Tellus Lite V-Simulator prior to v4.0.12.0 is vulnerable to an out-of-bounds read, which may allow an attacker to read sensitive information from other memory locations or cause a crash.

Affected products

Fuji Electric V-Server Lite: before 4.0.12.0 — fixed in 4.0.12.0
Fujielectric V-Simulator: before 4.0.12.0 — fixed in 4.0.12.0

How to fix

Upgrade to a fixed version: Fuji Electric V-Server Lite 4.0.12.0; Fujielectric V-Simulator 4.0.12.0. Check the vendor advisory for mitigations.

References

https://www.cisa.gov/uscert/ics/advisories/icsa-21-299-01
https://www.cisa.gov/uscert/ics/advisories/icsa-21-299-01

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