Is CVE-2021-27372 actively exploited?

No active exploitation of CVE-2021-27372 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-27372 be exploited remotely?

Yes. CVE-2021-27372 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-27372?

CVE-2021-27372 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2021-27372

CRITICAL

CVE-2021-27372

CWE-522Published: March 25, 2021· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Realtek xPON RTL9601D SDK 1.9 stores passwords in plaintext which may allow attackers to possibly gain access to the device with root permissions via the build-in network monitoring tool and execute arbitrary commands.

NVD Source

Technical Analysis

CVE-2021-27372 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

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 9.8.