CVE-2026-0792 in 8180 IP Audio Alerter
Summary
by MITRE • 01/23/2026
ALGO 8180 IP Audio Alerter SIP INVITE Alert-Info Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of ALGO 8180 IP Audio Alerter devices. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the handling of the Alert-Info header of SIP INVITE requests. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the device. Was ZDI-CAN-28301.
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Analysis
by VulDB Data Team • 02/18/2026
The CVE-2026-0792 vulnerability represents a critical stack-based buffer overflow flaw in ALGO 8180 IP Audio Alerter devices that enables remote code execution without authentication requirements. This vulnerability specifically targets the Session Initiation Protocol (SIP) INVITE message processing within the device's firmware, making it particularly dangerous as it can be exploited through standard SIP communication channels. The flaw exists in the Alert-Info header parsing mechanism, which is commonly used in SIP communications to indicate the type of alert or notification that should be triggered during a call setup process. This vulnerability falls under CWE-121, stack-based buffer overflow, and aligns with ATT&CK technique T1203, Exploitation for Client Execution, as it allows remote attackers to execute arbitrary code on the target device.
The technical implementation of this vulnerability occurs when the device receives a SIP INVITE request containing a malformed Alert-Info header. The system fails to properly validate the length of the user-supplied data before copying it into a fixed-length stack buffer, creating an exploitable condition where an attacker can overflow the buffer and overwrite adjacent memory locations. This memory corruption can potentially overwrite the return address on the stack, allowing an attacker to redirect execution flow to malicious code. The vulnerability's remote exploitability is particularly concerning as it does not require authentication, meaning any network-accessible device can be targeted. The attack vector operates through standard SIP communication protocols, making it difficult to detect and filter at network boundaries. This type of vulnerability represents a classic example of unsafe string handling in embedded systems, where buffer size validation is insufficient to prevent memory corruption.
The operational impact of this vulnerability extends beyond simple remote code execution, as it can provide attackers with complete control over the affected device. Once exploited, attackers can potentially gain persistent access to the network infrastructure, use the device as a pivot point for lateral movement, or manipulate audio alert systems that may be critical for security operations. The device's role in audio alerting systems means that exploitation could potentially disrupt security operations or provide unauthorized access to sensitive areas where these alerters are deployed. Organizations relying on ALGO 8180 devices for security monitoring or emergency alerting systems face significant risks, as the vulnerability could be exploited to disable or manipulate critical alert infrastructure. The lack of authentication requirements makes this vulnerability particularly attractive to attackers, as it eliminates the need for credential harvesting or other authentication bypass techniques.
Mitigation strategies for CVE-2026-0792 should focus on immediate firmware updates from the vendor, as well as network-based protections such as SIP message filtering and rate limiting to prevent exploitation attempts. Network segmentation and monitoring of SIP traffic can help detect anomalous Alert-Info header patterns that may indicate exploitation attempts. The vulnerability's classification under CWE-121 and ATT&CK technique T1203 emphasizes the need for proper input validation and memory safety practices in embedded firmware development. Organizations should also implement network access controls to limit SIP traffic to trusted sources only, and consider deploying intrusion detection systems that can identify and block malicious SIP INVITE messages. Additionally, regular vulnerability assessments and security audits of networked audio alerting systems are crucial to identify similar vulnerabilities in other devices within the security infrastructure, as this type of buffer overflow vulnerability is common in embedded systems with insufficient input validation mechanisms.