CVE-2026-3894
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedOut-of-bounds Read vulnerability in RTI Connext Professional (Core Libraries) allows Overread Buffers.This issue affects Connext Professional: from 7.4.0 before 7.7.0, from 7.0.0 before 7.3.1.3, from 6.1.0 before 6.1.*, from 6.0.0 before 6.0.*, from 5.3.0 before 5.3.*, from 5.0.0 before 5.2.*.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceOut-of-bounds read vulnerability in RTI Connext Professional Core Libraries allows attackers to read memory beyond buffer boundaries, potentially exposing sensitive data or causing denial of service. The vulnerability affects multiple version branches of the middleware.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data>= 5.0.0, < 7.7.0CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify RTI Connext installationLocate the RTI Connext Professional installation directory or verify the installed package. Check for files such as rti_version.h, version info in NDDSHOME, or query the installed packages via system package manager if applicable.Affected if RTI Connext Professional is installed and the installation directory or version file is found.
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Determine installed versionInspect version information in the installed RTI Connext files, such as version header files (e.g., rti_version.h), README files, or run any version-querying utility provided with the installation. Note the full version number including patch releases.Affected if The version cannot be determined or the installation is present but lacks version metadata.
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Compare version against affected rangeCompare the identified version number to the affected range: versions 5.0.0 and later through any version below 7.7.0 are vulnerable. Check if the version falls within 5.0.0 <= version < 7.7.0.Affected if The installed version is 5.0.0 or later but earlier than 7.7.0, indicating the environment is affected by the out-of-bounds read vulnerability.
The environment is affected if RTI Connext Professional is installed with a version in the range 5.0.0 to 7.7.0 (exclusive of 7.7.0).
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped7.7.0
Upgrade to vendor-patched versions (7.7.0+, 7.3.1.3+, or patched 6.x/5.x releases) or apply available vendor patches. Prioritize testing in non-production environments before deployment.
RTI Connext Professional 7.7.0 or later
- Identify the currently installed RTI Connext Professional version using the version check utility or library manifest
- Download RTI Connext Professional version 7.7.0 or later from the official RTI website (www.rti.com)
- Backup all existing Connext configurations, XML profiles, and any custom deployment settings
- Install the upgraded Connext Professional 7.7.0+ version following the standard installation procedures
- Restore configurations and verify the installation by running the RTI diagnostic tools
- Test critical DDS communication patterns to ensure functionality is preserved after the upgrade
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation6.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-3894 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-3894 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data