CVE-2023-26434

MEDIUM
4.3
CVSS Score
Published: June 20, 2023 at 07:51 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
MEDIUM4.3
Exploit prediction
EPSS 1%

Description

When adding an external mail account, processing of POP3 "capabilities" responses are not limited to plausible sizes. Attacker with access to a rogue POP3 service could trigger requests that lead to excessive resource usage and eventually service unavailability. We now limit accepted POP3 server response to reasonable length/size. 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-rev39

Remediation

No guide yet

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

CVSS

4.3MEDIUMOX
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400NVD-CWE-noinfo

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