Is CVE-2021-26620 actively exploited?

No active exploitation of CVE-2021-26620 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-26620 be exploited remotely?

Yes. CVE-2021-26620 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-26620?

CVE-2021-26620 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2021-26620

CWE-287Published: March 25, 2022· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

An improper authentication vulnerability leading to information leakage was discovered in iptime NAS2dual. Remote attackers are able to steal important information in the server by exploiting vulnerabilities such as insufficient authentication when accessing the shared folder and changing user’s passwords.

NVD Source

Technical Analysis

CVE-2021-26620 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), with a CVSS base score of 7.5.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.