CVE-2021-35032: Zyxel GS1900-10hp Firmware

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

A vulnerability in the 'libsal.so' of the Zyxel GS1900 series firmware version 2.60 could allow an authenticated local user to execute arbitrary OS commands via a crafted function call.

Affected products

• Zyxel GS1900-10hp Firmware: before 2.70\(aazi.0\)-20211208 (fixed in 2.70\(aazi.0\)-20211208)
• Zyxel GS1900-16 Firmware: before 2.70\(aahj.0\)-20211208 (fixed in 2.70\(aahj.0\)-20211208)
• Zyxel GS1900-24 Firmware: before 2.70\(aahl.0\)-20211208 (fixed in 2.70\(aahl.0\)-20211208)
• Zyxel GS1900-24e Firmware: before 2.70\(aahk.0\)-20211208 (fixed in 2.70\(aahk.0\)-20211208)
• Zyxel GS1900-24ep Firmware: before 2.70\(abto.0\)-20211208 (fixed in 2.70\(abto.0\)-20211208)
• Zyxel GS1900-24hp Firmware: before 2.70\(aahm.0\)-20211208 (fixed in 2.70\(aahm.0\)-20211208)
• Zyxel GS1900-24hpv2 Firmware: before 2.70\(aatp.0\)-20211208 (fixed in 2.70\(aatp.0\)-20211208)
• Zyxel GS1900-48 Firmware: before 2.70\(aahn.0\)-20211208 (fixed in 2.70\(aahn.0\)-20211208)
• Zyxel GS1900-48hp Firmware: before 2.70\(aaho.0\)-20211208 (fixed in 2.70\(aaho.0\)-20211208)
• Zyxel GS1900-48hpv2 Firmware: before 2.70\(abtq.0\)-20211208 (fixed in 2.70\(abtq.0\)-20211208)
• Zyxel GS1900-8 Firmware: before 2.70\(aahh.0\)-20211208 (fixed in 2.70\(aahh.0\)-20211208)
• Zyxel GS1900-8hp Firmware: before 2.70\(aahi.0\)-20211208 (fixed in 2.70\(aahi.0\)-20211208)

Published 2021-12-28. Last modified 2026-06-17.