A vulnerability has been found in Foxit PDF Editor and PDF Reader and classified as critical. This impacts an unknown function of the component JavaScript Handler. The manipulation leads to use after free.
This vulnerability is traded as CVE-2026-3777. It is possible to initiate the attack remotely. There is no exploit available.
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CVE-2026-3777 | Foxit PDF Editor/PDF Reader JavaScript use after free (WID-SEC-2026-0934)
A vulnerability has been found in Foxit PDF Editor and PDF Reader and classified as critical. This impacts an unknown function of the component JavaScript Handler. The manipulation leads to use after free. This vulnerability is traded as…
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IoC Intelligence (1 Indikatoren)
CVE-2026-3777
IR-PLAYBOOK-VULN-REMEDIATION
MEDIUMSOC Incident Playbook: Vulnerability Remediation & Verification
1-Click Detection Engineering: Sigma & YARA Rules
SOC Readytitle: Detect Exploitation - CVE-2026-3777 | Foxit PDF Editor/PDF Reader JavaScript use after free (WID-SEC-2026-0934)
id: 14a1e5e5-6c3e-4b18-8a40-51e15eba61c8
status: experimental
description: Automatisch generierte SIEM-Erkennungsregel basierend auf CTI Intelligence
references:
- https://tsecurity.de/
author: iShareStuff CTI Automated Detection Engine
date: 2026-09-24
logsource:
category: network_connection
product: any
detection:
selection:
CommandLine|contains:
- 'exploit'
condition: selection
falsepositives:
- Legitime administrative Zugriffe oder Penetrationstests
level: high
tags:
- attack.initial_accessrule CTI_Threat_Indicator {
meta:
author = "iShareStuff CTI Automated Detection Engine"
date = "2026-09-24"
description = "YARA Signature for "
strings:
$str = "CVE-2026-3777 | Foxit PDF Edit" ascii wide
condition:
any of them
}
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