How severe is CVE-2021-38418?

CVE-2021-38418 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-38418 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-38418?

CVE-2021-38418 affects Deltaww Dialink. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-38418?

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-2021-38418 published?

CVE-2021-38418 was published on 2021-11-03 and last updated on 2026-06-17.

CVE-2021-38418

CVE-2021-38418 is a high-severity vulnerability in Deltaww Dialink with a CVSS 3.x base score of 8.8. 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-319.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 4.3
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-319
Affected product: Deltaww Dialink
Published: 2021-11-03
Last modified: 2026-06-17

Description

Delta Electronics DIALink versions 1.2.4.0 and prior runs by default on HTTP, which may allow an attacker to be positioned between the traffic and perform a machine-in-the-middle attack to access information without authorization.

Frequently asked questions

What is CVE-2021-38418?: Delta Electronics DIALink versions 1.2.4.0 and prior runs by default on HTTP, which may allow an attacker to be positioned between the traffic and perform a machine-in-the-middle attack to access information without authorization.
How severe is CVE-2021-38418?: CVE-2021-38418 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-38418 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-38418?: CVE-2021-38418 affects Deltaww Dialink. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-38418?: 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-2021-38418 published?: CVE-2021-38418 was published on 2021-11-03 and last updated on 2026-06-17.

References

https://us-cert.cisa.gov/ics/advisories/icsa-21-294-02

Affected products (1)

cpe:2.3:a:deltaww:dialink:*:*:*:*:*:*:*:*

More vulnerabilities in Deltaww Dialink

CVE-2025-58321 — Critical (CVSS 10.0): Delta Electronics DIALink has an Directory Traversal Authentication Bypass Vulnerability.
CVE-2022-2660 — Critical (CVSS 9.8): Delta Industrial Automation DIALink versions 1.4.0.0 and prior are vulnerable to the use of a hard-coded cryptographic…
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CVE-2021-38422 — High (CVSS 7.8): Delta Electronics DIALink versions 1.2.4.0 and prior stores sensitive information in cleartext, which may allow an…
CVE-2021-38420 — High (CVSS 7.8): Delta Electronics DIALink versions 1.2.4.0 and prior default permissions give extensive permissions to low-privileged…
CVE-2021-38416 — High (CVSS 7.8): Delta Electronics DIALink versions 1.2.4.0 and prior insecurely loads libraries, which may allow an attacker to use DLL…

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