CVE-2026-3664

LOW 3.3

xlnt-community xlnt Encrypted XLSX File compound_document.cpp read_directory out-of-bounds

CVSS Score

3.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-125 CWE-119
Vendor	xlnt-community
Product	xlnt
Published	Mar 7, 2026
Last Updated	Mar 11, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

xlnt-community / xlnt

1.6.0 1.6.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/?id.349553 vuldb.com: https://vuldb.com/?ctiid.349553 vuldb.com: https://vuldb.com/?submit.764646 github.com: https://github.com/xlnt-community/xlnt/issues/141 github.com: https://github.com/oneafter/0128/blob/main/xl5/repro github.com: https://github.com/xlnt-community/xlnt/pull/147 github.com: https://github.com/xlnt-community/xlnt/

Credits

🔍 Oneafter (VulDB User)