CVE-2020-10181

What is Sumavision EMR?

Sumavision is a Chinese vendor of broadcast and IPTV infrastructure, and its Enhanced Multimedia Router (EMR) line handles multicast video stream routing for cable and telecom operators delivering IPTV services. These devices sit deep in a service provider's video-delivery network, and an attacker who gains administrative control over one can manipulate stream routing across an operator's subscriber base rather than just a single device.

Overview

CVE-2020-10181 is a cross-site request forgery vulnerability (CWE-352) in the EMR's web management interface. Because the device's administrative endpoints do not validate that a state-changing request genuinely originated from the device's own web UI, an attacker can craft a malicious page that, when visited by an authenticated administrator's browser, silently submits a request creating a new administrator account under the attacker's control — with no interaction beyond the victim loading a page.

Technical Details

The vulnerability is a textbook CSRF: administrative actions on the EMR web interface — including user creation — are triggered by simple, predictable HTTP requests with no anti-CSRF token, no re-authentication step, and no origin/referer validation tying the request to the device's own interface. An attacker who can get an authenticated administrator's browser to load a crafted page or image (e.g., via a phishing link or a compromised site the administrator visits) can silently issue the account-creation request in the background, using the administrator's own authenticated session (CVSS 3.1: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, 9.8 Critical — CISA's scoring treats the attack as reachable without the normal user-interaction caveat CSRF usually carries, reflecting how trivially it can be embedded in ordinary web content).

Discovery

Publicly tracked via NVD; no specific researcher attribution is documented in public sources.

Exploitation Context

CISA added this CVE to KEV in November 2021, indicating confirmed exploitation activity, though detailed public incident reporting on specific campaigns against Sumavision EMR deployments is limited — consistent with a niche, telecom-operator-facing product that doesn't attract the same security research attention as consumer-facing software.

Remediation

1. Apply the vendor's fix or configuration guidance for CSRF protection on the EMR web management interface — contact Sumavision support for the current patched firmware if none has already been applied.
2. Restrict access to the EMR management interface to a dedicated, isolated management network; it should never be reachable from general user-facing segments or the internet.
3. Log out of the management interface when not actively administering the device, and avoid browsing other sites or opening untrusted links in the same browser session used for EMR administration.
4. Audit the administrator account list on any EMR device for unrecognized accounts, particularly if the device has ever been managed from a browser also used for general web browsing.