CVE-2026-40012
Deferred Deferred - Pending Action

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;

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-06-25
Last Modified
2026-06-25
Generated
2026-07-16
AI Q&A
2026-06-25
EPSS Evaluated
2026-07-14
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
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-524 The code uses a cache that contains sensitive information, but the cache can be read by an actor outside of the intended control sphere.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
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.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-40012. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart