Is CVE-2021-22676 actively exploited?

No active exploitation of CVE-2021-22676 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-22676 be exploited remotely?

Yes. CVE-2021-22676 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-22676?

CVE-2021-22676 has a CVSS score of 6.1 (MEDIUM).

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MEDIUM

CVE-2021-22676

CWE-79Published: August 10, 2021· Updated: Jun 17, 2026

6.1

CVSS v3.1

Official Description

UserExcelOut.asp within WebAccess/SCADA is vulnerable to cross-site scripting (XSS), which could allow an attacker to send malicious JavaScript code. This could result in hijacking of cookie/session tokens, redirection to a malicious webpage, and unintended browser action on the WebAccess/SCADA (WebAccess/SCADA versions prior to 8.4.5, WebAccess/SCADA versions prior to 9.0.1).

NVD Source

Technical Analysis

CVE-2021-22676 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.