An uninitialized pointer issue has been identified in the way the application processes project files, allowing an attacker to craft a spec…

published 2021-01-27 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-9775

cvss: 7.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.9%; EPSS 1.9% chance of exploitation in 30 days, percentile 80%
public exploits: 0; none known

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).

Patch / fix

fixed in 2

fujielectric v-server 4.0.10.0
fujielectric v-simulator 4.0.10.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-026-01 updated 2021-01-26 cvss 7.8

Fuji Electric Tellus Lite V-Simulator and V-Server Lite

Fuji Electric Tellus Lite V-Simulator < 4.0.10.0 Fuji Electric V-Server Lite < 4.0.10.0
affected: mitigation “Fuji Electric recommends updating to the current version v4.0.10.0. Both disks are required for updating. Login is required to download the files.” felib.fujielectric.co.jp

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

1.94% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

n/a Tellus Lite V-Simulator and V-Server Lite

Classification

Weakness

CWE-824 Access of Uninitialized Pointer

References

us-cert.cisa.gov /ics/advisories/icsa-21-026-01
third-party-advisory, us-government-resource
zerodayinitiative.com /advisories/ZDI-21-098/
third-party-advisory, vdb-entry

Sources

CVE List CVE-2021-22639
NVD CVE-2021-22639

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary