CVE-2026-3663
3.3 · LOWOverview
CVE-2026-3663 is a low-severity vulnerability affecting xlnt-community xlnt. It was published on March 7, 2026 and has a CVSS 3.1 base score of 3.3 (LOW).
This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
A vulnerability was found in xlnt-community xlnt up to 1.6.1. This issue affects the function xlnt::detail::compound_document_istreambuf::xsgetn of the file source/detail/cryptography/compound_document.cpp of the component XLSX File Parser. Performing a manipulation results in out-of-bounds read. The attack is only possible with local access. The exploit has been made public and could be used. The patch is named 147. It is recommended to apply a patch to fix this issue.
Remediation
Check the references section for vendor advisories and patches from xlnt-community. Update xlnt to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| xlnt-community | xlnt | 0 | Affected |
Frequently Asked Questions
What is CVE-2026-3663?
CVE-2026-3663 is a low-severity vulnerability affecting xlnt-community xlnt. It was published on March 7, 2026 and has a CVSS 3.1 base score of 3.3 (LOW).
How severe is CVE-2026-3663?
This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-3663?
Check the references section for vendor advisories and patches from xlnt-community. Update xlnt to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-3663?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-3663 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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