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

77
Patch now
HIGH 7.8EXPLOITEDUPGRADEUPGRADEUPGRADE

CVE-2009-1862 is a high-severity flaw (CVSS 7.8) affecting acrobat, acrobat reader, flash player, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Unspecified vulnerability in Adobe Reader and Acrobat 9.x through 9.1.2, and Adobe Flash Player 9.x through 9.0.159.0 and 10.x through 10.0.22.87, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via (1) a crafted Flash application in a .pdf file or (2) a crafted .swf file, related to authplay.dll, as exploited in the wild in July 2009.

Why this priority

  • High severity
  • EPSS top 2%: very likely to be exploited
  • Exploited in the wild (CISA KEV)

A fixed release or distro patch exists.

Risk facts

CVSS score7.8 (High)
Attack vectorLocal
Attack complexityLow
Privileges neededNone
User interactionRequired
EPSS exploit chance21.2% (top 2%)
CISA exploited listYes, fix due 2022-06-22
WeaknessCWE-787
Published2009-07-23
Last modified2026-06-16
Publisher (CNA): MITRE · Vendor: adobe

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Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

adobe acrobat UPGRADE
Affected: >= 9.0 and <= 9.1.2
Fixed in: newer than 9.1.2
Safe to downgrade to: a release before 9.0
1. Check installed version
apt-cache policy acrobat || rpm -q acrobat || acrobat --version
2. UPGRADE to newer than 9.1.2 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade acrobat
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade acrobat
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 9.0 (Debian / Ubuntu)
apt-cache madison acrobat sudo apt install acrobat=<VERSION_BEFORE_9.0> sudo apt-mark hold acrobat
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list acrobat sudo dnf downgrade acrobat-<VERSION_BEFORE_9.0> sudo dnf versionlock add acrobat
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
adobe acrobat reader UPGRADE
Affected: >= 9.0 and <= 9.1.2
Fixed in: newer than 9.1.2
Safe to downgrade to: a release before 9.0
1. Check installed version
apt-cache policy acrobat-reader || rpm -q acrobat-reader || acrobat-reader --version
2. UPGRADE to newer than 9.1.2 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade acrobat-reader
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade acrobat-reader
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 9.0 (Debian / Ubuntu)
apt-cache madison acrobat-reader sudo apt install acrobat-reader=<VERSION_BEFORE_9.0> sudo apt-mark hold acrobat-reader
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list acrobat-reader sudo dnf downgrade acrobat-reader-<VERSION_BEFORE_9.0> sudo dnf versionlock add acrobat-reader
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
adobe flash player UPGRADE
Affected: >= 9.0 and <= 9.0.159.0 · >= 10.0 and <= 10.0.22.87
Fixed in: newer than 10.0.22.87
Safe to downgrade to: a release before 9.0
1. Check installed version
apt-cache policy flash-player || rpm -q flash-player || flash-player --version
2. UPGRADE to newer than 10.0.22.87 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade flash-player
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade flash-player
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 9.0 (Debian / Ubuntu)
apt-cache madison flash-player sudo apt install flash-player=<VERSION_BEFORE_9.0> sudo apt-mark hold flash-player
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list flash-player sudo dnf downgrade flash-player-<VERSION_BEFORE_9.0> sudo dnf versionlock add flash-player
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Fedora 46 · rust-ingredients · FIXED · 0.3.3-2.fc46 · FEDORA-2026-0b3d9feffd · source
sudo dnf upgrade --advisory=FEDORA-2026-0b3d9feffd
Fedora ELN · dpkg · FIXED · 1.23.11-2.eln159 · FEDORA-2026-732e4ac21b · source
sudo dnf upgrade --advisory=FEDORA-2026-732e4ac21b
Verify at the official source NVD · CVE Program · CISA KEV catalog · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2009-1862?

acrobat: upgrade to newer than 9.1.2; acrobat reader: upgrade to newer than 9.1.2; flash player: upgrade to newer than 10.0.22.87. Exact commands for each OS are on this page.

Is CVE-2009-1862 being exploited?

Yes. CVE-2009-1862 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2009-1862 affect?

CVE-2009-1862 affects acrobat, acrobat reader, flash player. Severity is high (CVSS 7.8). Unspecified vulnerability in Adobe Reader and Acrobat 9.x through 9.1.2, and Adobe Flash Player 9.x through 9.0.159.0 and 10.x through 10.0.22.87, allows remote attackers to execute arbitrary code or cause a denial of service (memory corrup

How urgent is CVE-2009-1862?

Priority 77/100. High severity; EPSS top 2%: very likely to be exploited; Exploited in the wild (CISA KEV)

Software pages

Adobe Acrobat vulnerabilities · Adobe Reader vulnerabilities · Adobe Flash vulnerabilities

Related CVEs

References

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