CVE-2026-5941: CWE-20 Improper input validation in Foxit Software Inc. Foxit PDF Editor
CVE-2026-5941 is a high-severity vulnerability in Foxit PDF Editor affecting versions 2026.1 and earlier, and 14.0.3 and earlier. It involves improper input validation in the parsing logic, where malformed form field hierarchies cause non-signature data to be misidentified as valid signatures. This results in invalid memory writes and program crashes during internal data structure construction. The vulnerability has a CVSS score of 7.8, indicating significant impact on confidentiality, integrity, and availability. The product is a cloud service, and a patch is available. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
CVE-2026-5941 is a vulnerability in Foxit PDF Editor's parsing logic caused by improper input validation (CWE-20). Specifically, malformed form field hierarchies can cause the software to misidentify non-signature data as valid signatures, leading to invalid memory writes and program crashes during internal data structure construction. This flaw affects versions 2026.1 and earlier, and 14.0.3 and earlier. The vulnerability has a CVSS 3.1 base score of 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), reflecting a high severity with potential impact on confidentiality, integrity, and availability. The product is delivered as a cloud service, and a patch is available from the vendor. No active exploitation has been reported.
Potential Impact
Successful exploitation can cause invalid memory writes and program crashes, impacting the availability of the Foxit PDF Editor service. The vulnerability also affects confidentiality and integrity due to misidentification of data as valid signatures. Given the CVSS score of 7.8, the impact is considered high. No known exploits are currently active in the wild.
Mitigation Recommendations
A patch is available for this vulnerability. Since Foxit PDF Editor is offered as a cloud service, the vendor manages remediation server-side. Users should verify with Foxit's official advisory that their service instance has been updated. There are no reports of required user action beyond applying the official patch or update.
CVE-2026-5941: CWE-20 Improper input validation in Foxit Software Inc. Foxit PDF Editor
Description
CVE-2026-5941 is a high-severity vulnerability in Foxit PDF Editor affecting versions 2026.1 and earlier, and 14.0.3 and earlier. It involves improper input validation in the parsing logic, where malformed form field hierarchies cause non-signature data to be misidentified as valid signatures. This results in invalid memory writes and program crashes during internal data structure construction. The vulnerability has a CVSS score of 7.8, indicating significant impact on confidentiality, integrity, and availability. The product is a cloud service, and a patch is available. There are no known exploits in the wild at this time.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-5941 is a vulnerability in Foxit PDF Editor's parsing logic caused by improper input validation (CWE-20). Specifically, malformed form field hierarchies can cause the software to misidentify non-signature data as valid signatures, leading to invalid memory writes and program crashes during internal data structure construction. This flaw affects versions 2026.1 and earlier, and 14.0.3 and earlier. The vulnerability has a CVSS 3.1 base score of 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), reflecting a high severity with potential impact on confidentiality, integrity, and availability. The product is delivered as a cloud service, and a patch is available from the vendor. No active exploitation has been reported.
Potential Impact
Successful exploitation can cause invalid memory writes and program crashes, impacting the availability of the Foxit PDF Editor service. The vulnerability also affects confidentiality and integrity due to misidentification of data as valid signatures. Given the CVSS score of 7.8, the impact is considered high. No known exploits are currently active in the wild.
Mitigation Recommendations
A patch is available for this vulnerability. Since Foxit PDF Editor is offered as a cloud service, the vendor manages remediation server-side. Users should verify with Foxit's official advisory that their service instance has been updated. There are no reports of required user action beyond applying the official patch or update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Foxit
- Date Reserved
- 2026-04-09T03:42:15.877Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Is Cloud Service
- true
Threat ID: 69ef48cfba26a39fba1d6dc5
Added to database: 4/27/2026, 11:30:23 AM
Last enriched: 5/26/2026, 8:05:33 PM
Last updated: 6/12/2026, 12:51:10 AM
Views: 56
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