CVE-2025-15542

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

MEDIUM
5.3
CVSS Score
Published: January 29, 2026 at 06:06 PM UTC
Updated: June 17, 2026 at 08:37 AM UTC
2 products affected across 1 vendorVX800V FirmwareVX800v

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 800.0.12
tp-link-vx800v (same device)
v < 800.0.12 (0.12.0 3.0.0 v603c.0 Build 250912)
Affected range stops below 800.0.12 (0.12.0 3.0.0 v603c.0 Build 250912), so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-754

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