Is CVE-2021-38435 in the CISA KEV catalog?

No. CVE-2021-38435 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-38435?

CVE-2021-38435 has a CVSS v3 base score of 6.6 (MEDIUM).

What is the EPSS score for CVE-2021-38435?

CVE-2021-38435 has an EPSS score of 1.42% (70th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-38435?

Upgrade connext professional to 6.1.0 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-38435

MEDIUM

6.6

CVSS v3

NVD

Description

RTI Connext DDS Professional and Connext DDS Secure Versions 4.2x to 6.1.0 not correctly calculate the size when allocating the buffer, which may result in a buffer overflow.

CWE-131

How to fix

Remediation Available

connext professionalNVD

Affected:>= 4.2, < 6.1.0Fixed in:6.1.0CVE-2021-38435derived from NVD

connext secureNVD

Affected:>= 4.2, < 6.1.0Fixed in:6.1.0CVE-2021-38435derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityHigh

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

Exploit Intelligence

1.42%probability of exploitation in 30 days

70thpercentile

Moderate risk: more likely to be exploited than 70% of all known CVEs.

References

Vendor Advisory1

support.rti.com

Third-Party Advisory1

cisa.gov

Related Vulnerabilities

Other CWE-131 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-36824	High	7.4	77%	-	Fix
CVE-2020-8450	High	7.3	72%	-	Fix
CVE-2020-6113	High	7.8	69%	-	-
CVE-2026-42945	Critical	8.1	61%	-	Fix
CVE-2020-6116	High	7.8	28%	-	-
CVE-2005-3120	Critical	9.8	23%	-	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 2025-02-05.