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Known exploited · Adobe

CVE-2009-1862: Adobe Acrobat and Reader, Flash Player Unspecified Vulnerability

What it is

Adobe Acrobat and Reader and Adobe Flash Player allows remote attackers to execute code or cause denial-of-service (DoS).

Added June 8, 2022Due June 22, 2022CISA KEV catalog 2026.10.01

Vendor
Adobe
Product
Acrobat and Reader, Flash Player
Added to KEV
June 8, 2022
CISA due date
June 22, 2022
Ransomware use
Unknown

What CISA requires

For Adobe Acrobat and Reader, apply updates per vendor instructions. For Adobe Flash Player, the impacted product is end-of-life and should be disconnected if still in use.

Forensic triage

No

What to do now

  1. Find every instance of Acrobat and Reader, Flash Player you run, including the forgotten ones, and check its version against the vendor advisory.
  2. Apply the vendor's fix or mitigation, before June 22, 2022 if you are bound by CISA's deadline, sooner if it faces the internet.
  3. Assume it was tried against you already: look for signs of exploitation from the date it was added, not from the day you patched.
  4. Until every instance is patched, block the attack at the edge: a WAF in blocking mode stops PHP and Node.js code injection payloads.

References

CVE-2009-1862 in the National Vulnerability Database

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Source: CISA Known Exploited Vulnerabilities Catalog (public domain), catalog version 2026.10.01.