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AlienVault OTX Malware

A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This affects the function getpeer of the file /src/net_builtin.c of the component TCP Sequence Number Handler. The manipulation leads to improper verification of source of a communication channel. The attack may be initiated remotely. The attack's complexity is rated as high. The exploitability is reported as difficult. 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.

CVE-2026-2967 identifies a security vulnerability in Cesanta Mongoose, a widely used embedded web server and networking library, affecting all versions up to 7.20. The vulnerability resides in the getpeer function of the /src/net_builtin.c source file, specifically within the TCP Sequence Number Handler component. This function is responsible for verifying the source of incoming communication channels. Due to improper verification logic, an attacker can remotely manipulate the source validation process, potentially causing the system to accept malicious or spoofed TCP connections. The attack vector is network-based and does not require authentication or user interaction, but the complexity of successfully exploiting this flaw is high, making it difficult to execute. The vulnerability has been publicly disclosed, but no active exploitation has been reported. The vendor was notified early but has not issued any patches or advisories. The CVSS 4.0 base score is 6.3, reflecting a medium severity level, with the main impact being limited to data integrity (low impact) without affecting confidentiality or availability. This vulnerability could undermine trust in the communication channel, possibly enabling further attacks if combined with other vulnerabilities or misconfigurations.

Detailed information about CVE-2026-2967: Improper Verification of Source of a Communication Channel in Cesanta Mongoose affecting Cesanta Mongoose. Get real-ti

CVE-2026-2967: Improper Verification of Source of a Communication Channel in Cesanta Mongoose - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-2967: Improper Verification of Source of a Communication Channel in Cesanta Mongoose

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