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CVE-2011-0611: Adobe Flash Player Remote Code Execution Vulnerability

86
Patch now
HIGH 8.8EXPLOITEDUPGRADEUPGRADEUPGRADE

CVE-2011-0611 is a high-severity flaw (CVSS 8.8) affecting flash player, acrobat reader, adobe air, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Adobe Flash Player before 10.2.154.27 on Windows, Mac OS X, Linux, and Solaris and 10.2.156.12 and earlier on Android; Adobe AIR before 2.6.19140; and Authplay.dll (aka AuthPlayLib.bundle) in Adobe Reader 9.x before 9.4.4 and 10.x through 10.0.1 on Windows, Adobe Reader 9.x before 9.4.4 and 10.x before 10.0.3 on Mac OS X, and Adobe Acrobat 9.x before 9.4.4 and 10.x before 10.0.3 on Windows and Mac OS X allow remote attackers to execute arbitrary

Why this priority

  • High severity
  • EPSS top 1%: very likely to be exploited
  • Exploited in the wild (CISA KEV)
  • Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score8.8 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionRequired
EPSS exploit chance99.4% (top 1%)
CISA exploited listYes, fix due 2022-03-24
WeaknessCWE-843
Published2011-04-13
Last modified2026-06-16
Publisher (CNA): Adobe Systems Incorporated · Vendor: adobe · google · opensuse

Share: LinkedIn · X · Reddit

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

Am I affected?

Timeline

adobe flash player UPGRADE
Affected: < 10.2.154.27 · <= 10.2.156.12
Fixed in: 10.2.154.27
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy flash-player || rpm -q flash-player || flash-player --version
2. UPGRADE to 10.2.154.27 (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.
adobe acrobat reader UPGRADE
Affected: >= 9.0 and < 9.4.4 · >= 10.0 and <= 10.0.1 · >= 10.0 and < 10.0.3
Fixed in: 9.4.4, 10.0.3
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 9.4.4 (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 adobe air UPGRADE
Affected: < 2.6.19140
Fixed in: 2.6.19140
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy adobe-air || rpm -q adobe-air || adobe-air --version
2. UPGRADE to 2.6.19140 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade adobe-air
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade adobe-air
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
adobe acrobat UPGRADE
Affected: >= 9.0 and < 9.4 · >= 10.0 and < 10.0.3
Fixed in: 9.4, 10.0.3
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 9.4 (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.
google chrome UPGRADE
Affected: < 10.0.648.205
Fixed in: 10.0.648.205
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy chrome || rpm -q chrome || chrome --version
2. UPGRADE to 10.0.648.205 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade chrome
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade chrome
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
opensuse opensuse MITIGATE
Affected: 11.2 · 11.3 · 11.4
Fixed in: no fixed release known
Safe to downgrade to: a release before 11.2
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.
Fedora 46 · dupeguru · FIXED · 4.3.1^20261101git7a2c79f-1.fc46 · FEDORA-2026-fe4523382c · source
sudo dnf upgrade --advisory=FEDORA-2026-fe4523382c
Fedora ELN · openexr · FIXED · 3.4.13-3.eln159 · FEDORA-2026-827a613db5 · source
sudo dnf upgrade --advisory=FEDORA-2026-827a613db5
RHEL 6 Supplementary · flash-plugin · FIXED · flash-plugin-10.2.159.1-1.el6
sudo dnf upgrade --advisory=RHSA-2011:0451 rpm -q flash-plugin

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

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-2011-0611?

flash player: upgrade to 10.2.154.27; acrobat reader: upgrade to 9.4.4, 10.0.3; adobe air: upgrade to 2.6.19140. Exact commands for each OS are on this page.

Is CVE-2011-0611 being exploited?

Yes. CVE-2011-0611 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2011-0611 affect?

CVE-2011-0611 affects flash player, acrobat reader, adobe air. Severity is high (CVSS 8.8). Adobe Flash Player before 10.2.154.27 on Windows, Mac OS X, Linux, and Solaris and 10.2.156.12 and earlier on Android; Adobe AIR before 2.6.19140; and Authplay.dll (aka AuthPlayLib.bundle) in Adobe Reader 9.x before 9.4.4 and 10.x through 1

How urgent is CVE-2011-0611?

Priority 86/100. High severity; EPSS top 1%: very likely to be exploited; Exploited in the wild (CISA KEV); Public exploit reference

Software pages

Windows vulnerabilities · Android vulnerabilities · Google Chrome vulnerabilities · Adobe Acrobat vulnerabilities · Adobe Reader vulnerabilities · Adobe Flash vulnerabilities

Related CVEs

References

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