Is CVE-2021-20783 actively exploited?

No active exploitation of CVE-2021-20783 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-20783 be exploited remotely?

Yes. CVE-2021-20783 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-20783?

CVE-2021-20783 has a CVSS score of 8.8 (HIGH).

HOME VULNERABILITIESCVE-2021-20783

HIGH

CVE-2021-20783

CWE-352Published: July 30, 2021· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official Description

Cross-site request forgery (CSRF) vulnerability in Optical BB unit E-WMTA2.3 allows a remote attacker to hijack the authentication of administrators via a specially crafted page.

NVD Source

Technical Analysis

CVE-2021-20783 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.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.