CyberSecBulletin
CVE-2026-2467NVD status: Modified

Connext Professional: Heap-based Buffer Overflow

Published Updated By the CyberSecBulletin desk

CVE-2026-2467 is a high-severity heap-based buffer overflow vulnerability in Connext Professional from RTI, with a CVSS 3.1 base score of 8.1 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. The record lists versions 7.7.0, 7.3.1.3, 6.1.* as the first without the flaw, so updating Connext Professional to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.19% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Connext Professional to 7.7.0 or 7.3.1.3 or 6.1.* or 6.0.*, whichever matches your release line, or a later version.
  2. Read the advisory on rti.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
RTIConnext Professional7.4.0 up to, but not including, 7.7.0; 7.0.0 up to, but not including, 7.3.1.3; 6.1.0 up to, but not including, 6.1.*; 6.0.0 up to, but not including, 6.0.*; 5.3.0 up to, but not including, 5.3.*; 5.2.0 up to, but not including, 5.2.*; 5.0.0 up to, but not including, 5.1.*7.7.0, 7.3.1.3, 6.1.*, 6.0.*, 5.3.*, 5.2.*

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
LowA basic user account is enough.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
NoneNo data is disclosed.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 4.09.2CriticalCNA
CVSS 3.18.1HighNVD

Official description

Heap-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Variables and Tags. 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 5.2.0 before 5.2.*, from 5.0.0 before 5.1.*.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Heap-based Buffer Overflow

The product writes past the end of a buffer that was allocated on the heap.

How developers prevent this class of flaw

  • Pre-design: Use a language or compiler that performs automatic bounds checking.
  • Use an abstraction library to abstract away risky APIs. Not a complete solution.
  • Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking. D3-SFCV (Stack Frame Canary Validation) from D3FEND discusses canary-based detection in detail.

More Heap-based Buffer Overflow vulnerabilities (CWE-122)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Connext Professional

All Connext Professional vulnerabilities

Recent Heap-based Buffer Overflow vulnerabilities

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