CVE-2026-34621 - Acrobat Reader | Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (CWE-1321)

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• CVE-2026-34621: Acrobat Reader versions 24.001.30356, 26.001.21367 and earlier are affected by an Improperly Control CRITICAL
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Threat Actors

• Gamaredon (Russia)
• APT41 (Double Dragon) (China)
• Slingshot (US/UK)
• WellMess (Russia)