CVE-2026-3664
xlnt-community xlnt Encrypted XLSX File compound_document.cpp read_directory out-of-bounds
- State
- Published
- Severity
- 4.8 Medium
- Published
- Mar 7, 2026
- Updated
- Mar 11, 2026
- Reserved
- Mar 6, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 4.8 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 3.3 Low | 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 | VulDB |
| 3.0 | 3.3 Low | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C | VulDB |
| 2.0 | 1.7 Low | AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
xlntxlnt-community |
|
References
- VDB-349553 | xlnt-community xlnt Encrypted XLSX File compound_document.cpp read_directory out-of-boundsvdb-entrytechnical-description
- VDB-349553 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- Submit #764646 | xlnt-community xlnt commit bceb706 and before Memory Corruptionthird-party-advisory
- https://github.com/xlnt-community/xlnt/issues/141issue-tracking
- https://github.com/oneafter/0128/blob/main/xl5/reproexploit
- https://github.com/xlnt-community/xlnt/pull/147issue-trackingpatch
- https://github.com/xlnt-community/xlnt/product
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