CVE-2021-20698: Sharp-Nec-Displays c431 Firmware

Critical severity, CVSS 9.8. EPSS: 1.5% chance of exploitation in the next 30 days.

Sharp NEC Displays (UN462A R1.300 and prior to it, UN462VA R1.300 and prior to it, UN492S R1.300 and prior to it, UN492VS R1.300 and prior to it, UN552A R1.300 and prior to it, UN552S R1.300 and prior to it, UN552VS R1.300 and prior to it, UN552 R1.300 and prior to it, UN552V R1.300 and prior to it, UX552S R1.300 and prior to it, UX552 R1.300 and prior to it, V864Q R2.000 and prior to it, C861Q R2.000 and prior to it, P754Q R2.000 and prior to it, V754Q R2.000 and prior to it, C751Q R2.000 and prior to it, V984Q R2.000 and prior to it, C981Q R2.000 and prior to it, P654Q R2.000 and prior to it, V654Q R2.000 and prior to it, C651Q R2.000 and prior to it, V554Q R2.000 and prior to it, P404 R3.200 and prior to it, P484 R3.200 and prior to it, P554 R3.200 and prior to it, V404 R3.200 and prior to it, V484 R3.200 and prior to it, V554 R3.200 and prior to it, V404-T R3.200 and prior to it, V484-T R3.200 and prior to it, V554-T R3.200 and prior to it, C501 R2.000 and prior to it, C551 R2.000 and prior to it, C431 R2.000 and prior to it) allows an attacker to obtain root privileges and execute remote code by sending unintended parameters that contain specific characters in http request.

Affected products

• Sharp-Nec-Displays c431 Firmware: up to and including r2.000
• Sharp-Nec-Displays c501 Firmware: up to and including r2.000
• Sharp-Nec-Displays c551 Firmware: up to and including r2.000
• Sharp-Nec-Displays c651q Firmware: up to and including r2.000
• Sharp-Nec-Displays c751q Firmware: up to and including r2.000
• Sharp-Nec-Displays c861q Firmware: up to and including r2.000
• Sharp-Nec-Displays c981q Firmware: up to and including r2.000
• Sharp-Nec-Displays p404 Firmware: up to and including r3.201
• Sharp-Nec-Displays p484 Firmware: up to and including r3.201
• Sharp-Nec-Displays p554 Firmware: up to and including r3.201
• Sharp-Nec-Displays p654q Firmware: up to and including r2.000
• Sharp-Nec-Displays p754q Firmware: up to and including r2.000
• Sharp-Nec-Displays UN462A Firmware: up to and including r1.300
• Sharp-Nec-Displays UN462VA Firmware: up to and including r1.300
• Sharp-Nec-Displays UN492S Firmware: up to and including r1.300
• Sharp-Nec-Displays UN492VS Firmware: up to and including r1.300
• Sharp-Nec-Displays UN552 Firmware: up to and including r1.300
• Sharp-Nec-Displays UN552A Firmware: up to and including r1.300
• Sharp-Nec-Displays UN552S Firmware: up to and including r1.300
• Sharp-Nec-Displays UN552V Firmware: up to and including r1.300
• Sharp-Nec-Displays UN552VS Firmware: up to and including r1.300
• Sharp-Nec-Displays UX552 Firmware: up to and including r1.300
• Sharp-Nec-Displays UX552S Firmware: up to and including r1.300
• Sharp-Nec-Displays v404-T Firmware: up to and including r3.201
• Sharp-Nec-Displays v404 Firmware: up to and including r3.201
• and 9 more

Published 2021-06-07. Last modified 2026-06-17.