How severe is CVE-2021-38406?

CVE-2021-38406 has a CVSS score of 7.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2021-38406?

Affected package information for CVE-2021-38406 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2021-38406?

No fixed version has been published for CVE-2021-38406 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2021-38406 actively exploited in the wild?

Yes. There are 2 known exploit references for CVE-2021-38406, including 2 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

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

CVE-2021-38406 has an EPSS (Exploit Prediction Scoring System) score of 62.1%, placing it in the 98th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2021-38406 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2021-38406 (Delta Electronics DOPSoft 2 Improper Input Validation Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2022-08-25. CISA required all US federal civilian agencies to remediate this vulnerability by 2022-09-15. The required action was: The impacted product is end-of-life and should be disconnected if still in use. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2021-38406?

CVE-2021-38406 is classified as Out-of-bounds Write (CWE-787). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Which products and versions are affected by CVE-2021-38406?

CVE-2021-38406 affects deltaww dopsoft. Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2021-38406 published, and has it been updated?

CVE-2021-38406 was published on September 17, 2021 and was last updated on October 30, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2022-08-25 — agencies required to remediate by 2022-09-15

CVE-2021-38406

HIGH

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…

Published

Sep 17, 2021

Updated

Oct 30, 2025

Affected

0 pkgs

Patched

None yet

Exploits

2 known

EPSS Exploitation Probability

via FIRST.org ↗

62.1%probability of exploitation in next 30 days

High Risk98th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

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.

Affected Products

1 product · 1 configurations

Application

dopsoftdeltaww

≥ 2.00 && ≤ 2.00.07

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Delta Electronic DOPSoft 2 (Version 2.00.07 and prior) lacks proper vali…

unit42.paloaltonetworks.comAPIAug 2022

Delta Electronic DOPSoft 2 (Version 2.00.07 and prior) lacks proper vali…

cisa.govCISAAug 2022

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2021-38406 in your stack?

O3 detects CVE-2021-38406 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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