The Phone is Listening: A Cold War–Style Vulnerability in Modern VoIP

I don’t know about you, but when I think about “critical vulnerabilities,” I usually picture ransomware, data theft, or maybe a server falling over at 2 a.m. while someone frantically searches Slack for the last good backup. What I don’t picture is a scene straight out of a Cold War spy film...

ALPINE-CVE-2026-25994

PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, a buffer overflow vulnerability exists in PJNATH ICE Session when processing credentials with excessively long usernames...

PT-2026-7669

ASTPP 4.0.1 contains multiple vulnerabilities including cross-site scripting and command injection in SIP device configuration and plugin management interfaces. Attackers can exploit these flaws to inject system commands, hijack administrator sessions, and potentially execute arbitrary code with...

CVE-2025-15542

Improper handling of exceptional conditions in VX800v v1.0 in SIP processing allows an attacker to flood the device with crafted INVITE messages, blocking all voice lines and causing a denial of service on incoming calls...

CVE-2025-15542

Improper handling of exceptional conditions in VX800v v1.0 in SIP processing allows an attacker to flood the device with crafted INVITE messages, blocking all voice lines and causing a denial of service on incoming calls...

CVE-2025-15542 Denial of Service (DoS) of VoIP Communication on TP-Link VX800v

Improper handling of exceptional conditions in VX800v v1.0 in SIP processing allows an attacker to flood the device with crafted INVITE messages, blocking all voice lines and causing a denial of service on incoming calls...

EUVD-2025-206533

Improper handling of exceptional conditions in VX800v v1.0 in SIP processing allows an attacker to flood the device with crafted INVITE messages, blocking all voice lines and causing a denial of service on incoming calls...

CVE-2025-15542 Denial of Service (DoS) of VoIP Communication on TP-Link VX800v

Improper handling of exceptional conditions in VX800v v1.0 in SIP processing allows an attacker to flood the device with crafted INVITE messages, blocking all voice lines and causing a denial of service on incoming calls...

PT-2026-5321

Name of the Vulnerable Software and Affected Versions VX800v version 1.0 Description A flaw exists in the handling of exceptional conditions during SIP processing. An attacker can send specially crafted INVITE messages to flood the device, leading to a denial of service by blocking all voice line...

TP-Link VX800v security vulnerability

The TP-Link VX800v is a VoIP gateway produced by the Chinese company TP-Link. The TP-Link VX800v 1.0 version has a security vulnerability. This vulnerability stems from improper handling of exceptional conditions during SIP processing. It could allow attackers to flood the device with specially...

CVE-2026-0791

ALGO 8180 IP Audio Alerter SIP INVITE Replaces 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...

CVE-2026-0794

ALGO 8180 IP Audio Alerter SIP Use-After-Free 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...

CVE-2026-0791

ALGO 8180 IP Audio Alerter SIP INVITE Replaces 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...

CVE-2026-0792

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...

CVE-2026-0710

A flaw was found in SIPp. A remote attacker could exploit this by sending specially crafted Session Initiation Protocol SIP messages during an active call. This vulnerability, a NULL pointer dereference, can cause the application to crash, leading to a denial of service. Under specific conditions...

CVE-2026-0710 Sipp/sipp: sipp: denial of service and potential arbitrary code execution vulnerability

A flaw was found in SIPp. A remote attacker could exploit this by sending specially crafted Session Initiation Protocol SIP messages during an active call. This vulnerability, a NULL pointer dereference, can cause the application to crash, leading to a denial of service. Under specific conditions...

CVE-2026-0710 Sipp/sipp: sipp: denial of service and potential arbitrary code execution vulnerability

A flaw was found in SIPp. A remote attacker could exploit this by sending specially crafted Session Initiation Protocol SIP messages during an active call. This vulnerability, a NULL pointer dereference, can cause the application to crash, leading to a denial of service. Under specific conditions...

CVE-2026-0710

A flaw was found in SIPp. A remote attacker could exploit this by sending specially crafted Session Initiation Protocol SIP messages during an active call. This vulnerability, a NULL pointer dereference, can cause the application to crash, leading to a denial of service. Under specific conditions...

CVE-2026-0710 Sipp/sipp: sipp: denial of service and potential arbitrary code execution vulnerability

A flaw was found in SIPp. A remote attacker could exploit this by sending specially crafted Session Initiation Protocol SIP messages during an active call. This vulnerability, a NULL pointer dereference, can cause the application to crash, leading to a denial of service. Under specific conditions...

CVE-2026-0794

The CVE-2026-0794 entry concerns the ALGO 8180 IP Audio Alerter, where a Use-After-Free in SIP handling allows remote code execution. The flaw stems from not validating the existence of objects before operating on them, enabling code execution in the device context without authentication. Public ...