CVE-2026-91796
MediumCVSS 6.1Summary
The interface of Foxit PDF Editor/Reader lacks the permission verification for secure reading mode, which allows specially crafted PDFs to trigger external SMB authentication without any security prompts and thereby leak the hash of the user's credentials.
Risk Assessment
An attacker can obtain the user's credential hash, enabling relay attacks or offline cracking. This poses a serious threat to account and domain security.
Recommendation
Update Foxit PDF Editor/Reader to the latest version containing the fix. Consider blocking outbound SMB traffic and enforcing SMB signing to mitigate the risk.
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)
The interface of Foxit PDF Editor/Reader lacks the permission verification for secure reading mode, which allows specially crafted PDFs to trigger external SMB authentication without any security prompts and thereby leak the hash of the user's credentials.