CVE-2026-7866 PUBLISHED

Stack-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Buffers.

Assigner: RTI
Reserved: 05.05.2026 Published: 22.09.2026 Updated: 23.09.2026

Stack-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Buffers. This issue affects Connext Professional: from 7.4.0 before 7.7.0.1, from 7.0.0 before 7.3.1.6, 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 4.3x before 5.1.*.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CVSS Score: 10

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	None	Availability	High	Availability	High
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CVSS Score: 9.3

Security Extensions Enabled

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	None	Availability	High	Availability	High
Privileges Required	Low
User Interaction	None

Security Extensions Enabled

CVSS 4.0

Product Status

Vendor	RTI
Product	Connext Professional
Versions	Default: unaffected affected from 7.4.0 to 7.7.0.1 (excl.) affected from 7.0.0 to 7.3.1.6 (excl.) affected from 6.1.0 to 6.1.* (excl.) affected from 6.0.0 to 6.0.* (excl.) affected from 5.3.0 to 5.3.* (excl.) affected from 5.2.0 to 5.2.* (excl.) affected from 4.3x to 5.1.* (excl.)

References

https://www.rti.com/vulnerabilities/#cve-2026-7866

Problem Types

CWE-121 Stack-based Buffer Overflow CWE

Impacts

CAPEC-100 Overflow Buffers