CVE-2026-3664

low-risk
Published 2026-03-07

A vulnerability was determined in xlnt-community xlnt up to 1.6.1. Impacted is the function xlnt::detail::compound_document::read_directory of the file source/detail/cryptography/compound_document.cpp of the component Encrypted XLSX File Parser. Executing a manipulation can lead to out-of-bounds read. The attack is restricted to local execution. The exploit has been publicly disclosed and may be utilized. This patch is called 147. Applying a patch is advised to resolve this issue.

Do I need to act?

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0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.3/10 Low
LOCAL / LOW complexity

Affected Products (1)

Xlnt

Affected Vendors

Xlnt-Community

References (7)

Exploit https://github.com/oneafter/0128/blob/main/xl5/repro
Product https://github.com/xlnt-community/xlnt/
Exploit https://github.com/xlnt-community/xlnt/issues/141
Issue Tracking https://github.com/xlnt-community/xlnt/pull/147
Permissions Required https://vuldb.com/?ctiid.349553
Third Party Advisory https://vuldb.com/?id.349553
Third Party Advisory https://vuldb.com/?submit.764646
18
/ 100
low-risk
Severity 13/34 · Low
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal