Is CVE-2021-38406 in the CISA KEV catalog?

Yes. CVE-2021-38406 is on the CISA Known Exploited Vulnerabilities list, added 2022-08-25.

What is the CVSS severity of CVE-2021-38406?

CVE-2021-38406 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-38406?

CVE-2021-38406 has an EPSS score of 77.89% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2021-38406?

CVE-2021-38406 affects an end-of-life product with no vendor fix. CISA advises disconnecting affected systems.

CVE & CISA-KEV Catalog

CVE-2021-38406

HIGHCISA KEVEPSS 100th pctl

7.8

CVSS v3

NVD

Description

Delta Electronic DOPSoft 2 (Version 2.00.07 and prior) lacks proper validation of user-supplied data when parsing specific project files. This could result in multiple out-of-bounds write instances. An attacker could leverage this vulnerability to execute code in the context of the current process.

CWE-787Out-of-bounds Write

How to fix

No fix available - end of life

This product no longer receives security updates. CISA advises disconnecting affected systems if still in use.

CISA required action: The impacted product is end-of-life and should be disconnected if still in use.

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

77.89%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Delta Electronics DOPSoft 2 Improper Input Validation Vulnerability

Delta Electronics DOPSoft 2 lacks proper validation of user-supplied data when parsing specific project files (improper input validation) resulting in an out-of-bounds write that allows for code execution.

The impacted product is end-of-life and should be disconnected if still in use.

Remediation due: 2022-09-15

References

Third-Party Advisory1

us-cert.cisa.gov

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-30.