CVE-2026-2618 in 777VR1
Summary
by MITRE • 02/17/2026
A vulnerability was determined in Beetel 777VR1 up to 01.00.09. This impacts an unknown function of the component SSH Service. This manipulation causes risky cryptographic algorithm. The attack is possible to be carried out remotely. The attack is considered to have high complexity. The exploitability is said to be difficult. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 02/21/2026
The vulnerability identified as CVE-2026-2618 affects the Beetel 777VR1 router model with firmware versions up to 01.00.09, specifically targeting the SSH service component. This represents a critical security flaw that undermines the cryptographic integrity of the device's secure shell functionality. The vulnerability resides within an unknown function of the SSH service, making it particularly concerning as it operates in a black box manner that complicates both detection and remediation efforts. The affected device serves as a gateway for numerous networked devices, amplifying the potential impact of this cryptographic weakness.
The technical flaw manifests through the utilization of risky cryptographic algorithms within the SSH service implementation, which violates fundamental security principles outlined in industry standards such as CWE-327. This weakness allows attackers to potentially intercept and manipulate secure communications between network administrators and the device, creating opportunities for unauthorized access and privilege escalation. The cryptographic vulnerabilities present in the SSH implementation likely involve the use of weak encryption protocols, deprecated key exchange mechanisms, or insecure hash functions that have been identified as problematic in security frameworks like NIST SP 800-57 and RFC 7525. The high complexity required for exploitation suggests that attackers must overcome significant technical barriers, but the public disclosure of the exploit means that sophisticated adversaries may have already developed working attack vectors.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it can enable attackers to establish persistent backdoors within network infrastructures. Remote exploitation capabilities mean that attackers can target these devices from anywhere on the internet without requiring physical access or network proximity, making the attack surface extremely broad. The vulnerability's presence in a consumer-grade router like the Beetel 777VR1 creates a significant risk for home and small office networks, where such devices often serve as the primary gateway to broader network resources. This scenario aligns with ATT&CK technique T1021.004 for remote services and T1566 for credential harvesting, as attackers can leverage the compromised SSH service to gain unauthorized access to network resources and potentially escalate privileges within the local network environment.
Mitigation strategies should prioritize immediate firmware updates from the vendor, though the lack of vendor response to early disclosure attempts creates a significant challenge for users. Network segmentation and firewall rules should be implemented to restrict SSH access to only trusted sources, while monitoring for unusual SSH connection patterns can help detect potential exploitation attempts. The vulnerability's classification as having high complexity and difficult exploitability means that organizations should focus on defensive measures including intrusion detection systems, network monitoring, and regular security assessments. Additionally, administrators should consider disabling SSH access entirely if it is not required for operational purposes, and implement multi-factor authentication mechanisms where possible. The public disclosure of this exploit necessitates immediate action from affected users to protect their network infrastructure from potential compromise, as the vulnerability represents a significant risk to network security and data integrity.