Answer in brief
CVE-2026-4374 records a High severity (CVSS 8.8) vulnerability in Improper Restriction of XML External Entity Reference vulnerability in RTI Connext Professional (Recording Service,Routing Service,Queueing Service,Cloud Discovery Service,Observability Collector) allows Serialized Data External Linking, Data Serializat.... The current sources do not mark it as known exploited. The current feed maps RTI/Connext Professional (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps RTI/Connext Professional (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| RTI/Connext Professionalgeneric | >=7.4.0 <7.7.0 || >=7.0.0 <7.3.1.1 || >=6.1.0 <6.1.2.34 || >=6.0.0 <6.0.* || >=5.3.0 <5.3.* | 7.7.0, 7.3.1.1, 6.1.2.34, 6.0.*, 5.3.* |
Published upstream
Apr 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 22, 2026
Improper Restriction of XML External Entity Reference vulnerability in RTI Connext Professional (Recording Service,Routing Service,Queueing Service,Cloud Discovery Service,Observability Collector) allows Serialized Data External Linking, Data Serialization External Entities Blowup. This issue affects Connext Professional: from 7.4.0 before 7.7.0, from 7.0.0 before 7.3.1.1, from 6.1.0 before 6.1.2.34, from 6.0.0 before 6.0.*, from 5.3.0 before 5.3.*.
Quoted source text, attributed separately from HOL analysis.