CVE-2026-91797
HighCVSS 7.8Summary
Foxit PDF Editor/Reader failed to validate the directory traversal path in the attachment file name, resulting in malicious attachments being able to be written to directories outside the expected secure area when the PDF is opened.
Risk Assessment
An attacker can write arbitrary files to unexpected locations on the victim's system, which may be used for further escalation or overwriting important files.
Recommendation
Update Foxit PDF Editor/Reader to a patched version and exercise caution when opening PDF files from untrusted sources.
Other vulnerabilities in Foxit PDF Editor/Reader
See all- CVE-2026-91818High
A use-after-free vulnerability exists in Foxit PDF Editor/Reader's JavaScript handling of PDF annotations. Reentrant page-event processing during annotation enumeration may release the associated page object, which is subsequently accessed, resulting in an application crash.
- CVE-2026-91817Medium
A heap-based out-of-bounds read vulnerability exists in Foxit PDF Editor/Reader’s handling of wide strings in embedded PDF JavaScript. Insufficient validation of string-deletion ranges can cause an integer underflow, resulting in an out-of-bounds read and application crash.
- CVE-2026-91816High
A use-after-free vulnerability exists in Foxit PDF Editor/Reader's handling of PDF annotations. Reentrant annotation deletion triggered by embedded JavaScript can cause the application to access an annotation object after it has been released, resulting in a use-after-free condition and application crash.
- CVE-2026-91815High
Foxit PDF Editor/Reader does not perform sufficient verification of the JPEG2000 image metadata in the PDF file, which leads to out-of-bounds write in the heap buffer during decoding, potentially causing the program to crash and introducing the risk of arbitrary code execution.
- CVE-2026-91814Medium
A signature validation vulnerability exists in Foxit PDF Editor/Reader’s handling of incrementally updated PDF documents. Changes to visible document content may not invalidate the existing signature, allowing attackers to alter signed content and potentially carry out content spoofing while the document continues to appear validly signed.
- CVE-2026-91813High
A vulnerability in Foxit PDF Editor/Reader's update mechanism allows an update package to be replaced between download and high-privilege extraction due to insufficient file locking and integrity validation. This could enable local attackers to execute arbitrary code with elevated privileges.
- CVE-2026-91812High
A vulnerability in Foxit PDF Editor/Reader's update mechanism allows man-in-the-middle attackers to bypass certificate validation and package integrity checks, potentially enabling arbitrary code execution with system privileges.
- CVE-2026-91811High
A heap-based out-of-bounds write vulnerability exists in Foxit PDF Editor/Reader's PRC parser due to insufficient validation of vertex indices in triangular fan texture meshes. Successful exploitation could result in memory corruption and an application crash.
- CVE-2026-91810Medium
A heap-based out-of-bounds read vulnerability exists in Foxit PDF Editor/Reader's handling of malformed PDF image masks. Inconsistent image metadata may cause incorrect alpha-channel processing during rendering, resulting in an out-of-bounds read and application crash.
- CVE-2026-91809High
A use-after-free vulnerability exists in Foxit PDF Editor/Reader's handling of malformed PDF form fields. Improper validation during field-name traversal may cause the application to access a released object, resulting in an application crash.
Original NVD description (English source)
Foxit PDF Editor/Reader failed to validate the directory traversal path in the attachment file name, resulting in malicious attachments being able to be written to directories outside the expected secure area when the PDF is opened.