Is CVE-2026-21886 actively exploited?

No active exploitation of CVE-2026-21886 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-21886 be exploited remotely?

Yes. CVE-2026-21886 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-21886?

CVE-2026-21886 has a CVSS score of 8.1 (HIGH).

HOME VULNERABILITIESCVE-2026-21886

HIGH

CVE-2026-21886

CWE-285Published: March 17, 2026· Updated: Mar 19, 2026

8.1

CVSS v3.1

EPSS:0.05%probability of exploitation in 30 daysPercentile:13.9th

Official Description

OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to version 6.9.1, the GraphQL mutations "IndividualDeletionDeleteMutation" is intended to allow users to delete individual entity objects respectively. However, it was observed that this mutation can be misused to delete unrelated and sensitive objects such as analyses reports etc. This behavior stems from the lack of validation in the API to ensure that the targeted object is contextually related to the mutation being executed. Version 6.9.1 fixes the issue.

NVD Source

Technical Analysis

CVE-2026-21886 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.1.