Widely-used Adobe Acrobat Reader; critical RCE via prototype pollution could disrupt orgs.
CVE-2026-34622
Prototype pollution in Acrobat Reader enables arbitrary code execution via a malicious file (user interaction).
Is CVE-2026-34622 being exploited?
Not confirmed. CVE-2026-34622 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.42% probability of exploitation in the next 30 days.
How severe is CVE-2026-34622?
CVE-2026-34622 is rated High with a CVSS score of 8.6. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-34622?
Yes. A fix has been recorded for CVE-2026-34622. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-34622 affect?
CVE-2026-34622 affects Adobe Acrobat Reader, Acrobat Reader DC 26.001.21411, Acrobat Reader DC 24.001.30360, Acrobat Reader DC 24.001.30362. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-34622?
Apply updates when released; avoid opening untrusted files.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker can run code in the current user context by enticing a user to open a crafted file.
Patch when possible
- affected<= 24.001.30362 (Win), 24.001.30360 (Mac)
- affected<= 26.001.21411
- affected<= 26.001.21411
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.