CVE-2026-3870: Buffer Overflow
A buffer overflow vulnerability in the UPnP AddPortMapping() command in Zyxel VMG4005-B50B firmware versions through 5.13(ABRL.5.4)C0 could allow an adjacent attacker to trigger a temporary denial-of-service (DoS) condition affecting the UPnP function of the affected device.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-3870?
The severity of CVE-2026-3870 is rated as medium with a score of 6.5.
What does CVE-2026-3870 affect?
CVE-2026-3870 affects the UPnP AddPortMapping() command in Zyxel VMG4005-B50B firmware versions through 5.13(ABRL.5.4)C0.
How does CVE-2026-3870 impact devices?
CVE-2026-3870 can allow an adjacent attacker to trigger a temporary denial-of-service condition affecting the UPnP functionality of the device.
How do I fix CVE-2026-3870?
To fix CVE-2026-3870, it is recommended to update to the latest firmware version provided by Zyxel.
What type of vulnerability is CVE-2026-3870 classified as?
CVE-2026-3870 is classified as a buffer overflow vulnerability.