CVE-2021-33527 describes a critical arbitrary code execution vulnerability affecting MB connect line mbDIALUP versions 3.9R0.0 and earlier. A remote, unauthenticated attacker can exploit this by sending a specially crafted HTTP request, bypassing input validation and executing code with NT AUTHORITY\SYSTEM privileges. With a CVSS score of 9.8 (CRITICAL) and an easily exploitable network attack vector, the potential impact includes complete compromise of confidentiality, integrity, and availability. While no public exploit code or active exploitation has been confirmed, its high EPSS score and limited community discussion suggest it warrants attention.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 3.9R0.0, <= 3.9R0.0CPE match | cpe:2.3:a:mbconnectline:mbdialup:*:*:*:*:*:*:*:* | ||
<= 3.9r0.0CPE matchmatch criteria | cpe:2.3:a:mbconnectline:mbdialup:*:*:*:*:*:*:*:* |
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.
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.