CVE-2023-26436

HIGH
8.8
CVSS Score
Published: June 20, 2023 at 07:52 AM UTC
Updated: June 17, 2026 at 05:43 AM UTC
2 products affected across 2 vendorsOpen Xchange Appsuite BackendOX App Suite

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Severity
HIGH8.8
Exploit prediction
EPSS 1%

Description

Attackers with access to the "documentconverterws" API were able to inject serialized Java objects, that were not properly checked during deserialization. Access to this API endpoint is restricted to local networks by default. Arbitrary code could be injected that is being executed when processing the request. A check has been introduced to restrict processing of legal and expected classes for this API. We now log a warning in case there are attempts to inject illegal classes. No publicly available exploits are known.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Affected range stops below 7.10.6, so it looks safe — our inference, not a vendor statement
v ≤ 7.10.6-rev7

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-94CWE-502

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