CVE-2026-116237 in Pugongying X5 Pro
Summary
by MITRE • 10/26/2026
A vulnerability was found in Oray Pugongying X5 Pro 7.6.1. This affects an unknown part of the component Dnsmasq. Performing a manipulation results in crlf injection. Remote exploitation of the attack is possible. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 10/26/2026
The discovery of a critical security flaw within Oray Pugongying X5 Pro version 7.6.1 highlights significant risks associated with embedded networking components, specifically concerning the Dnsmasq service integrated into the device firmware. This vulnerability manifests as a Carriage Return Line Feed injection issue, commonly referred to as CRLF injection, which affects an unspecified internal component of Dnsmasq responsible for handling DNS queries and DHCP services. The presence of this flaw indicates that user-controllable input is not being adequately sanitized before being processed by the underlying network service logic, allowing attackers to inject malicious control characters into HTTP headers or other protocol fields managed by the application layer interacting with Dnsmasq.
From a technical perspective, CRLF injection vulnerabilities typically arise when an application incorporates unsanitized user input directly into header values without proper encoding or validation of special characters such as carriage returns and line feeds. In the context of DNS-related services like Dnsmasq, this can lead to severe consequences including HTTP response splitting if the service interacts with web-based management interfaces, or potentially more complex attacks involving cache poisoning or request smuggling depending on how the injected data is interpreted by downstream proxies or clients. The ability to inject these characters allows an attacker to manipulate the structure of network responses, potentially bypassing security controls like Content Security Policies or injecting malicious scripts if the response is rendered in a browser context.
The operational impact of this vulnerability is substantial due to its remote exploitability and the public availability of proof-of-concept code. Since the attack can be executed remotely without authentication, any device running version 7.6.1 that exposes network services accessible from untrusted networks becomes an immediate target. The existence of a public exploit significantly lowers the barrier for entry, enabling less sophisticated threat actors to compromise these devices. Compromised Oray Pugongying X5 Pro units could be leveraged as part of botnets, used for lateral movement within local networks, or serve as gateways for further attacks against other connected IoT devices and infrastructure. The lack of vendor response exacerbates the risk by leaving users without official patches or guidance on mitigation strategies during a critical window of exposure.
This vulnerability aligns with CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component, which categorizes failures to neutralize special elements that could alter command structure or data interpretation. Additionally, the exploitation technique relates to ATT&CK T1071 Application Layer Protocol, as it involves manipulating standard protocols for malicious purposes, and potentially T1568 Dynamic Resolution if used in conjunction with domain generation algorithms for command and control infrastructure. The public disclosure of the exploit underscores the urgency for immediate remediation efforts by system administrators and users who rely on this hardware for network connectivity.
Mitigation strategies should prioritize upgrading to a patched version of the firmware as soon as it becomes available from Oray, although the lack of vendor communication suggests that users may need to monitor third-party security advisories or community forums for updates. In the interim, restricting access to the device's management interface and DNS services to trusted internal networks only can reduce the attack surface by preventing remote exploitation attempts over the internet. Implementing network segmentation ensures that even if a device is compromised, the blast radius remains contained within isolated subnets rather than affecting critical infrastructure or sensitive data stores. Regular monitoring of network traffic for anomalous patterns associated with CRLF injection payloads can also aid in early detection and incident response efforts.