CVE-2009-3958: Multiple stack-based buffer overflows in the NOS Microsystems getPlus Helper ActiveX control before 1.6.2.49 i

Q: How do I fix CVE-2009-3958?

acrobat: upgrade to newer than 9.2; acrobat reader: upgrade to newer than 9.2. Exact commands for each OS are on this page.

Q: Is CVE-2009-3958 being exploited?

CVE-2009-3958 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2009-3958 affect?

CVE-2009-3958 affects acrobat, acrobat reader. Severity is high (CVSS 10.0). Multiple stack-based buffer overflows in the NOS Microsystems getPlus Helper ActiveX control before 1.6.2.49 in gp.ocx in the Download Manager in Adobe Reader and Acrobat 9.x before 9.3, and 8.x before 8.2 on Windows and Mac OS X, might all

Q: How urgent is CVE-2009-3958?

Priority 65/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference

This week

HIGH 10.0UPGRADEUPGRADE

CVE-2009-3958 is a high-severity flaw (CVSS 10.0) affecting acrobat, acrobat reader. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple stack-based buffer overflows in the NOS Microsystems getPlus Helper ActiveX control before 1.6.2.49 in gp.ocx in the Download Manager in Adobe Reader and Acrobat 9.x before 9.3, and 8.x before 8.2 on Windows and Mac OS X, might allow remote attackers to execute arbitrary code via unspecified initialization parameters.

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	52.6% (top 1%)
CISA exploited list	No
Weakness	CWE-119
Published	2010-01-13
Last modified	2026-06-16

Publisher (CNA): Adobe Systems Incorporated · Vendor: adobe

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

Am I affected?

Timeline

2010-01-13 19:30 UTCPublished CVE record published
2026-06-16 23:12 UTCUpdated Record last modified

adobe acrobat UPGRADE

Affected: <= 9.2 · 3.0 · 3.1 · 4.0 · 4.0.5 · 4.0.5a · 4.0.5c · 5.0

Fixed in: newer than 9.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy acrobat || rpm -q acrobat || acrobat --version

2. UPGRADE to newer than 9.2 (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.

adobe acrobat reader UPGRADE

Affected: <= 9.2 · 3.0 · 3.01 · 3.02 · 4.0 · 4.0.5 · 4.0.5a · 4.0.5c

Fixed in: newer than 9.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy acrobat-reader || rpm -q acrobat-reader || acrobat-reader --version

2. UPGRADE to newer than 9.2 (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.

Public exploits and detection

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

Exploit-DB: Adobe GetPlus get_atlcom 1.6.2.48 - ActiveX Remote Execution

Verify at the official source NVD · CVE Program · 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-2009-3958?

acrobat: upgrade to newer than 9.2; acrobat reader: upgrade to newer than 9.2. Exact commands for each OS are on this page.

Is CVE-2009-3958 being exploited?

CVE-2009-3958 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2009-3958 affect?

CVE-2009-3958 affects acrobat, acrobat reader. Severity is high (CVSS 10.0). Multiple stack-based buffer overflows in the NOS Microsystems getPlus Helper ActiveX control before 1.6.2.49 in gp.ocx in the Download Manager in Adobe Reader and Acrobat 9.x before 9.3, and 8.x before 8.2 on Windows and Mac OS X, might all

How urgent is CVE-2009-3958?

Priority 65/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference

Software pages

Windows vulnerabilities · Adobe Acrobat vulnerabilities · Adobe Reader vulnerabilities

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References

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