Critical Baicells Nova 430H Vulnerability Exposes Cellular Networks to DoS Attacks
Executive Summary
A critical vulnerability (CVE-2026-96274) was discovered in Baicells Nova 430H eNodeB equipment that allows unauthenticated attackers within radio range to cause denial-of-service conditions. The flaw stems from improper validation of uplink messages during connection setup, where malformed NAS payloads can trigger shutdowns of signaling associations between the eNodeB and core network. This results in temporary service disruptions affecting cellular connectivity until systems re-establish their connections. Baicells has not responded to CISA's mitigation requests, leaving users without vendor support for this high-severity issue.
This vulnerability highlights the growing security risks in critical communications infrastructure, particularly as 5G networks expand globally and nation-state actors increasingly target telecommunications equipment for disruption and espionage campaigns.
Why This Matters Now
With telecommunications infrastructure under constant threat from nation-state actors and the rapid deployment of 5G networks worldwide, unpatched vulnerabilities in cellular equipment create critical attack vectors for service disruption and potential espionage operations.
Attack Path Analysis
An unauthenticated attacker within radio range exploited CVE-2026-96274 in Baicells Nova 430H eNodeB by injecting malformed uplink messages during connection setup, containing invalid NAS payloads that the device forwarded without validation to the core network, triggering a denial-of-service condition and temporary service disruption until connectivity was re-established.
Kill Chain Progression
This analysis maps confirmed threat intelligence to the full cloud kill chain to show where defensive gaps would emerge as an attack progresses.
Initial Compromise
Description
Attacker positioned device within radio range of vulnerable Baicells Nova 430H eNodeB and initiated connection setup to exploit CVE-2026-96274
Related CVEs
CVE-2026-96274
CVSS 7.4An uncaught exception vulnerability in Baicells Nova 430H eNodeB allows an unauthenticated device within radio range to send malformed uplink messages during connection setup, causing denial of service and temporary service disruption.
Affected Products:
Baicells Technologies Nova 430H eNodeB – <=BaiBLQ_3.0.12
Exploit Status:
no public exploit
MITRE ATT&CK® Techniques
Endpoint Denial of Service
Application or System Exploitation
Exploit Public-Facing Application
Hardware Additions
Adversary-in-the-Middle
Network Denial of Service
Potential Compliance Exposure
Mapping incident impact across multiple compliance frameworks.
CISA Zero Trust Maturity Model 2.0 – Network Segmentation and Micro-segmentation
Control ID: Networks Function 3
NIS2 Directive – Cybersecurity Risk Management Measures
Control ID: Article 21
Digital Operational Resilience Act (DORA) – Testing of ICT Systems
Control ID: Article 11
NYDFS 23 NYCRR 500 – Penetration Testing and Vulnerability Assessments
Control ID: 500.15
PCI DSS 4.0 – Internal Vulnerability Scans
Control ID: 11.3.1
ISO 27001:2022 – Management of Technical Vulnerabilities
Control ID: A.12.6.1
Sector Implications
Industry-specific impact of the vulnerabilities, including operational, regulatory, and cloud security risks.
Telecommunications
Baicells Nova 430H eNodeB denial-of-service vulnerability exposes critical cellular infrastructure to unauthenticated radio-range attacks causing temporary service disruptions.
Utilities
Communications infrastructure vulnerabilities threaten smart grid operations and critical utility network connectivity, potentially disrupting power generation and distribution monitoring systems.
Government Administration
CISA advisory highlights government communications infrastructure risks from cellular equipment vulnerabilities affecting emergency services and inter-agency connectivity networks.
Transportation
Cellular network disruptions from eNodeB vulnerabilities impact connected vehicle systems, traffic management infrastructure, and transportation coordination communications.
Sources
- Baicells Nova 430Hhttps://www.cisa.gov/news-events/ics-advisories/icsa-26-272-04Verified
- Baicells Technologies Contact Supporthttps://www.baicells.com/contact-usVerified
- CISA Known Exploited Vulnerabilities Cataloghttps://www.cisa.gov/known-exploited-vulnerabilities-catalogVerified
Frequently Asked Questions
Cloud Native Security Fabric Mitigations and ControlsCNSF
Based on the attack progression modeled above, these are the defensive controls that would constrain each stage.
Aviatrix Zero Trust CNSF would constrain attacker reachability and reduce blast radius by implementing segmented network access controls and east-west traffic inspection. The framework's multicloud visibility and egress enforcement capabilities would likely limit the scope of denial-of-service impact across the cellular infrastructure.
Control: Cloud Native Security Fabric (CNSF)
Mitigation: Network segmentation policies would likely constrain attacker access to isolated network zones, reducing the scope of vulnerable eNodeB devices reachable through infrastructure connections.
Control: Zero Trust Segmentation
Mitigation: Zero trust segmentation would likely constrain lateral access pathways by enforcing identity-based authentication requirements even for network components with unauthenticated interfaces.
Control: East-West Traffic Security
Mitigation: East-west traffic inspection would likely limit attacker movement between cellular infrastructure components by enforcing micro-segmentation policies that restrict inter-device communication pathways.
Control: Multicloud Visibility & Control
Mitigation: Visibility controls would likely detect and constrain anomalous signaling patterns by monitoring cellular protocol communications and identifying malformed message injection attempts across infrastructure.
Control: Egress Security & Policy Enforcement
Mitigation: Egress policy enforcement would likely constrain unauthorized outbound data flows by implementing controlled data paths and monitoring cellular network traffic for anomalous patterns.
Residual service disruption would likely be constrained to isolated network segments with reduced blast radius affecting fewer cellular subscribers and limited geographic coverage areas.
Impact at a Glance
Affected Business Functions
- Cellular Network Operations
- Wireless Communications Infrastructure
- Mobile Network Connectivity
- Radio Access Network Services
Estimated downtime: 1 days
Estimated loss: $50,000
No data exposure confirmed - vulnerability results in denial of service affecting cellular network availability and connectivity rather than data compromise
Recommended Actions
Key Takeaways & Next Steps
- • Implement inline IPS with Suricata signatures to detect and block malformed cellular protocol messages before they reach critical infrastructure
- • Deploy multicloud visibility controls to monitor anomalous interactions and repeated malformed requests targeting telecommunications infrastructure
- • Establish zero trust segmentation to isolate critical telecommunications equipment from untrusted radio access networks
- • Configure egress security policies to prevent unauthorized communication patterns from compromised cellular infrastructure to external networks
- • Enable threat detection and anomaly response capabilities to baseline normal cellular traffic patterns and alert on protocol violations
