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CVE-2021-38433

24
FAUCET Score

CVE-2021-38433 is a stack-based buffer overflow vulnerability affecting RTI Connext DDS Professional and Connext DDS Secure versions 4.2x to 6.1.0. This high-severity vulnerability (CVSS 7.8) allows a local attacker to execute arbitrary code with low complexity and no user interaction, potentially leading to full compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.2, < 6.1.0CPE matchmatch criteria
cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*
>= 4.2, < 6.1.0CPE matchmatch criteria
cpe:2.3:a:rti:connext_secure:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.6MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.55%
Probability of exploitation in next 30 days
EPSS Percentile
42.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0055 is in the 82nd percentile among its peer group of 17,061 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

support.rti.com / s/login
Permissions RequiredVendor Advisory
cisa.gov / uscert/ics/advisories/icsa-21-315-02
Third Party AdvisoryUS Government Resource