CVE-2026-3663

LOW EPSS 6.7%
Published Mar 7, 20263mo ago · Modified Apr 29, 20262mo ago
1.9 CVSS 4.0
Low
Find Similar
Published Mar 7, 2026 3mo ago
Last Modified Apr 29, 2026 2mo ago

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.

CVSS Details

Base Score
1.9
Exploitability
—
Impact
—
Vector string
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
6.7% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 2

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer Memory Safety
CWE-125 Out-of-bounds Read Memory Safety

Affected Products 1

VendorProductVersionRange
xlnt-communityxlnt* ≤1.6.1

References 7

  • github.com https://github.com/oneafter/0128/blob/main/xl3/repro
    Exploit
  • github.com https://github.com/xlnt-community/xlnt/
    Product
  • github.com https://github.com/xlnt-community/xlnt/issues/139
    ExploitIssue TrackingVendor Advisory
  • github.com https://github.com/xlnt-community/xlnt/pull/147
    Issue Tracking
  • vuldb.com https://vuldb.com/?ctiid.349552
    Permissions RequiredVDB Entry
  • vuldb.com https://vuldb.com/?id.349552
    Third Party AdvisoryVDB Entry
  • vuldb.com https://vuldb.com/?submit.764644
    Third Party AdvisoryVDB Entry

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.