CVE-2026-40012
Received Received - Intake
ECS Zero Scoped Answers Stored in Packet Cache

Publication date: 2026-06-25

Last updated on: 2026-06-25

Assigner: Open-Xchange

Description
ECS zero scoped answers are stored in the packet cache while they should not. This impacts only configurations that have ECS enabled;
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Meta Information
Published
2026-06-25
Last Modified
2026-06-25
Generated
2026-06-25
AI Q&A
2026-06-25
EPSS Evaluated
N/A
NVD
CVE-2026-40012
EUVD
EUVD-2026-39356
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
open-xchange ecs *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability involves ECS zero scoped answers being stored in the packet cache when they should not be. It only affects configurations where ECS (EDNS Client Subnet) is enabled.

Impact Analysis

The impact of this vulnerability is limited to the confidentiality of information, as indicated by the CVSS score. Since ECS zero scoped answers are stored improperly in the packet cache, it could lead to unintended exposure of client subnet information. However, it does not affect integrity or availability.

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