How severe is CVE-2021-22641?

CVE-2021-22641 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-22641 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22641?

CVE-2021-22641 primarily affects Fujielectric V-server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-22641?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-22641 published?

CVE-2021-22641 was published on 2021-01-27 and last updated on 2026-06-17.

CVE-2021-22641

CVE-2021-22641 is a high-severity vulnerability in Fujielectric V-server with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Fujielectric V-server
Published: 2021-01-27
Last modified: 2026-06-17

Description

A heap-based buffer overflow 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).

Frequently asked questions

What is CVE-2021-22641?: A heap-based buffer overflow 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).
How severe is CVE-2021-22641?: CVE-2021-22641 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-22641 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22641?: CVE-2021-22641 primarily affects Fujielectric V-server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-22641?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-22641 published?: CVE-2021-22641 was published on 2021-01-27 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:fujielectric:v-server:*:*:*:*:lite:*:*:*
cpe:2.3:a:fujielectric:v-simulator:*:*:*:*:lite:*:*:*

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CVE-2019-18240 — Critical (CVSS 9.8): In Fuji Electric V-Server 4.0.6 and prior, several heap-based buffer overflows have been identified, which may allow an…
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