CVE-2025-15542 Denial of Service (DoS) of VoIP Communication on TP-Link VX800v
An attacker can cause a denial of service on TP-Link VX800v devices by flooding them with crafted SIP INVITE messages, blocking voice lines.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-15542?
CVE-2025-15542 is a medium-severity denial of service vulnerability in TP-Link Systems Inc. VX800v v1.0, published on 29 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-754
Which versions are affected by CVE-2025-15542?
It affects 1 product.
Products include Tp-Link Vx800v Firmware.
How do I fix CVE-2025-15542?
No fix has been published for CVE-2025-15542 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-15542 being exploited?
There is no known exploitation of CVE-2025-15542 in the wild and no public exploit code.
Other vulnerabilities in TP-Link Systems Inc. VX800v v1.0
- CVE-2025-13399 Insecure Encryption in Communication with the Web Interface on TP-Link VX800v
- CVE-2025-15541 Access to System Files via SFTP on TP-Link VX800v
- CVE-2025-15548 Missing Application-Layer Encryption in Web Interface Endpoints on TP-Link VX800v
- CVE-2025-15543 Read-Only Root Access via USB Storage Device in TP-Link VX800v
Sources
Also known as GHSA-mcfx-6pwv-q5v8.