CVE-2021-20677: Necplatforms SL2100 Firmware

Low severity, CVSS 3.1. EPSS: 0.9% chance of exploitation in the next 30 days.

UNIVERGE Aspire series PBX (UNIVERGE Aspire WX from 1.00 to 3.51, UNIVERGE Aspire UX from 1.00 to 9.70, UNIVERGE SV9100 from 1.00 to 10.70, and SL2100 from 1.00 to 3.00) allows a remote authenticated attacker to cause system down and a denial of service (DoS) condition by sending a specially crafted command.

Affected products

• Necplatforms SL2100 Firmware: from 1.00, up to and including 3.00
• Necplatforms Univerge Aspire Ux Firmware: from 1.00, up to and including 9.70
• Necplatforms Univerge Aspire Wx Firmware: from 1.00, up to and including 3.51
• Necplatforms Univerge SV9100 Firmware: from 1.00, up to and including 10.70

Published 2021-03-26. Last modified 2026-06-17.