CRLF Injection in Dnsmasq rent_time Parameter

A security vulnerability has been detected in Oray Pugongying X5 Pro 7.6.1. This impacts an unknown function of the component Dnsmasq. The manipulation of the argument rent_time leads to crlf injection. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Casky was already ahead

This CVE exploits attack patterns that Casky's 323matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

Oray Pugongying X5 Pro 7.6.1 contains a critical CRLF (Carriage Return Line Feed) injection vulnerability in the Dnsmasq component, specifically through manipulation of the rent_time argument. This vulnerability allows remote attackers to inject arbitrary control characters into application data flows, potentially enabling HTTP response splitting, cache poisoning, or command injection attacks. The vulnerability is particularly dangerous because Dnsmasq is a lightweight DNS and DHCP server widely deployed in network infrastructure, routers, and IoT devices. With a CVSS score of 9.1 and public exploit disclosure combined with vendor non-responsiveness, organizations running Oray Pugongying X5 Pro 7.6.1 face immediate risk of compromise without patching options.

Casky's 323 mapped security skills leverage Claude's extended reasoning capabilities to detect the attack patterns associated with this vulnerability across two critical MITRE ATT&CK techniques: TA0001 (Reconnaissance) and TA0043 (Reconnaissance via network traffic analysis). Practitioners using Casky would observe findings related to CWE-74 (Improper Neutralization of Special Elements) and CWE-93 (Improper Neutralization of CRLF Sequences) detection patterns. The platform's Claude-powered analysis would identify suspicious DNS query patterns, anomalous DHCP lease time parameters containing control characters, and malformed protocol messages that indicate exploitation attempts. Security teams would see correlated indicators such as unexpected newline sequences in network logs, HTTP response smuggling patterns in proxy/firewall logs, and attempts to manipulate protocol state through injected metacharacters—enabling rapid threat hunting and incident response before damage occurs.

Live Threat IntelligenceComing soon

Casky Risk Score

—

EPSS Probability

—

Shodan Exposure

—

GreyNoise Signal

—

Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →

323 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-116233.

Abuse of Public-Facing API: Mobile API Abuse

mobile security · low

Run

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

MITRE ATT&CK Techniques

TA0001 TA0043

Investigate the attack patterns behind CVE-2026-116233

Casky has 323 skills that investigate the attack patterns behind CVE-2026-116233. Run one and get CVSS-scored findings in 3 minutes.

Run the skill that detects this →

X Instagram LinkedIn