CVE-2021-20699 is a critical buffer overflow vulnerability affecting numerous Sharp NEC Displays models (e.g., UN462A, V864Q, P404, C501) with specific firmware versions. An unauthenticated attacker can exploit this by sending crafted HTTP requests with overly long parameters containing special characters, leading to remote code execution. With a CVSS score of 9.8 (Critical), this vulnerability poses a significant risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While no public exploits (Metasploit, Nuclei, ExploitDB) are currently available and there is minimal community discussion or media coverage, the potential for severe compromise warrants immediate patching.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= r1.300CPE matchmatch criteria | cpe:2.3:o:sharp-nec-displays:un462a_firmware:*:*:*:*:*:*:*:* | ||
<= r1.300CPE matchmatch criteria | cpe:2.3:o:sharp-nec-displays:un462va_firmware:*:*:*:*:*:*:*:* | ||
<= r1.300CPE matchmatch criteria | cpe:2.3:o:sharp-nec-displays:un492s_firmware:*:*:*:*:*:*:*:* | ||
<= r1.300CPE matchmatch criteria | cpe:2.3:o:sharp-nec-displays:un492vs_firmware:*:*:*:*:*:*:*:* | ||
<= r1.300CPE matchmatch criteria | cpe:2.3:o:sharp-nec-displays:un552a_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.