How severe is CVE-2018-19021?

CVE-2018-19021 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-19021 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-19021?

CVE-2018-19021 primarily affects Emerson Deltav. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-19021?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-19021 published?

CVE-2018-19021 was published on 2019-01-25 and last updated on 2026-06-17.

CVE-2018-19021

CVE-2018-19021 is a medium-severity vulnerability in Emerson Deltav with a CVSS 3.x base score of 6.5. 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-307.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 3.3
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-307
Affected product: Emerson Deltav
Published: 2019-01-25
Last modified: 2026-06-17

Description

A specially crafted script could bypass the authentication of a maintenance port of Emerson DeltaV DCS Versions 11.3.1, 11.3.2, 12.3.1, 13.3.1, 14.3, R5.1, R6 and prior, which may allow an attacker to cause a denial of service.

Frequently asked questions

What is CVE-2018-19021?: A specially crafted script could bypass the authentication of a maintenance port of Emerson DeltaV DCS Versions 11.3.1, 11.3.2, 12.3.1, 13.3.1, 14.3, R5.1, R6 and prior, which may allow an attacker to cause a denial of service.
How severe is CVE-2018-19021?: CVE-2018-19021 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-19021 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-19021?: CVE-2018-19021 primarily affects Emerson Deltav. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-19021?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-19021 published?: CVE-2018-19021 was published on 2019-01-25 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:a:emerson:deltav:*:*:*:*:*:*:*:*
cpe:2.3:a:emerson:deltav:11.3.1:*:*:*:*:*:*:*
cpe:2.3:a:emerson:deltav:11.3.2:*:*:*:*:*:*:*
cpe:2.3:a:emerson:deltav:12.3.1:*:*:*:*:*:*:*
cpe:2.3:a:emerson:deltav:13.3.1:*:*:*:*:*:*:*
cpe:2.3:a:emerson:deltav:14.3:*:*:*:*:*:*:*

More vulnerabilities in Emerson Deltav

CVE-2018-14795 — High (CVSS 8.8): DeltaV Versions 11.3.1, 12.3.1, 13.3.0, 13.3.1, and R5 is vulnerable due to improper path validation which may allow an…
CVE-2018-14793 — High (CVSS 8.8): DeltaV Versions 11.3.1, 12.3.1, 13.3.0, 13.3.1, and R5 is vulnerable to a buffer overflow exploit through an open…
CVE-2021-44463 — High (CVSS 8.1): Missing DLLs, if replaced by an insider, could allow an attacker to achieve local privilege escalation on the DeltaV…
CVE-2018-14797 — High (CVSS 7.8): Emerson DeltaV DCS versions 11.3.1, 12.3.1, 13.3.0, 13.3.1, R5 allow a specially crafted DLL file to be placed in the…
CVE-2018-14791 — High (CVSS 7.8): Emerson DeltaV DCS versions 11.3.1, 12.3.1, 13.3.0, 13.3.1, R5 may allow non-administrative users to change executable…
CVE-2012-1817 — High (CVSS 7.5): Buffer overflow in Emerson DeltaV and DeltaV Workstations 9.3.1, 10.3.1, 11.3, and 11.3.1 and DeltaV ProEssentials…

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