Is CVE-2021-40720 actively exploited?

No active exploitation of CVE-2021-40720 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-40720 be exploited remotely?

Yes. CVE-2021-40720 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-40720?

CVE-2021-40720 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2021-40720

CRITICAL

CVE-2021-40720

CWE-502Published: October 15, 2021· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Ops CLI version 2.0.4 (and earlier) is affected by a Deserialization of Untrusted Data vulnerability to achieve arbitrary code execution when the checkout_repo function is called on a maliciously crafted file. An attacker can leverage this to execute arbitrary code on the victim machine.

NVD Source

Technical Analysis

CVE-2021-40720 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.

From a weakness classification perspective (CWE-502): Insecure deserialization vulnerabilities allow attackers to inject malicious objects during deserialization, potentially enabling remote code execution.