CVE-2026-3665

xlnt-community xlnt XLSX File xlsx_consumer.cpp read_office_document null pointer dereference

MEDIUM
5.5
CVSS Score
Published: March 7, 2026 at 03:32 PM UTC
Updated: June 17, 2026 at 10:43 AM UTC
1 product affected across 1 vendorXlnt

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

A vulnerability was identified in xlnt-community xlnt up to 1.6.1. The affected element is the function xlnt::detail::xlsx_consumer::read_office_document of the file source/detail/serialization/xlsx_consumer.cpp of the component XLSX File Parser. The manipulation leads to null pointer dereference. The attack must be carried out locally. The exploit is publicly available and might be used.

Affected

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

Remediation

No guide yet

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

References (6)

VDB EntryTechnical DescriptionThird Party Advisory
Source: cverecord
https://vuldb.com/?id.349554
SignaturePermissions RequiredVDB Entry
Source: cverecord
https://vuldb.com/?ctiid.349554
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/?submit.764647
Issue TrackingExploitVendor Advisory
Source: cverecord
https://github.com/xlnt-community/xlnt/issues/140

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

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

Quick Info

StatusANALYZED
CWE
CWE-476CWE-404

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