CVE-2021-20776 describes a critical improper authentication vulnerability in A-Stage Inc.'s SCT-40CM01SR and AT-40CM01SR devices. This flaw allows an unauthenticated attacker to bypass access restrictions and execute arbitrary commands via Telnet, posing a severe risk to affected systems. With a CVSS score of 9.8 (Critical), the vulnerability is easily exploitable over the network with no user interaction or privileges required, leading to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation, public exploit code, or KEV listing, the vulnerability has garnered significant community discussion, indicating awareness among security researchers.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:a-stage-inc:at-40cm01sr_firmware:-:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:a-stage-inc:sct-40cm01sr_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.