How severe is CVE-2021-38435?

CVE-2021-38435 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability high.

Is CVE-2021-38435 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-38435?

CVE-2021-38435 primarily affects Rti Connext Professional. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-38435?

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

When was CVE-2021-38435 published?

CVE-2021-38435 was published on 2022-05-05 and last updated on 2026-06-17.

CVE-2021-38435

CVE-2021-38435 is a medium-severity vulnerability in Rti Connext Professional with a CVSS 3.x base score of 6.6. 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-131.

Key facts

Severity: Medium (CVSS 3.x base score 6.6)
CVSS v2: 7.5
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-131
Affected product: Rti Connext Professional
Published: 2022-05-05
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-38435?: 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.
How severe is CVE-2021-38435?: CVE-2021-38435 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability high.
Is CVE-2021-38435 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-38435?: CVE-2021-38435 primarily affects Rti Connext Professional. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-38435?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-38435 published?: CVE-2021-38435 was published on 2022-05-05 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*
cpe:2.3:a:rti:connext_secure:*:*:*:*:*:*:*:*

More vulnerabilities in Rti Connext Professional

CVE-2024-52061 — Critical (CVSS 9.8): Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in RTI Connext Professional (Core…
CVE-2024-52057 — Critical (CVSS 9.8): Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in RTI Connext…
CVE-2025-14543 — Critical (CVSS 9.1): Improper Restriction of XML External Entity Reference vulnerability in RTI Connext Professional (Core Libraries) allows…
CVE-2026-4374 — Critical (CVSS 9.1): Improper Restriction of XML External Entity Reference vulnerability in RTI Connext Professional (Cloud Discovery…
CVE-2025-4993 — Critical (CVSS 9.1): Untrusted Pointer Dereference vulnerability in RTI Connext Professional (Core Libraries) allows Pointer…
CVE-2025-1255 — Critical (CVSS 9.1): Untrusted Pointer Dereference vulnerability in RTI Connext Professional (Core Libraries) allows Pointer…

All CVEs affecting Rti Connext Professional →

Other CWE-131 (Incorrect Calculation of Buffer Size) vulnerabilities

CVE-2026-52955 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: libceph: Fix potential out-of-bounds access in…
CVE-2026-41676 — Critical (CVSS 9.8): rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.9.27 to before 0.10.78,…
CVE-2026-1949 — Critical (CVSS 9.8): Delta Electronics AS320T has incorrect calculation of the buffer size on the stack in the GET/PUT request handler of…
CVE-2026-20911 — Critical (CVSS 9.8): A heap-based buffer overflow vulnerability exists in the HuffTable::initval functionality of LibRaw Commit 0b56545 and…
CVE-2025-1861 — Critical (CVSS 9.8): In PHP from 8.1.* before 8.1.32, from 8.2.* before 8.2.28, from 8.3.* before 8.3.19, from 8.4.* before 8.4.5, when…
CVE-2023-5941 — Critical (CVSS 9.8): In versions of FreeBSD 12.4-RELEASE prior to 12.4-RELEASE-p7 and FreeBSD 13.2-RELEASE prior to 13.2-RELEASE-p5 the…

Browse all CWE-131 (Incorrect Calculation of Buffer Size) vulnerabilities →