CVE-2009-0183: Stack-based buffer overflow in Remote Control Server in Free Download Manager (FDM) 2.5 Build 758 and 3.0 Buil

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HIGH 10.0DOWNGRADE

CVE-2009-0183 is a high-severity flaw (CVSS 10.0) affecting free download manager. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stack-based buffer overflow in Remote Control Server in Free Download Manager (FDM) 2.5 Build 758 and 3.0 Build 844 allows remote attackers to execute arbitrary code via a long Authorization header in an HTTP request.

Why this priority

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

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	66.5% (top 1%)
CISA exploited list	No
Weakness	CWE-119
Published	2009-02-03
Last modified	2026-06-16

Publisher (CNA): Flexera Software LLC · Vendor: free download manager

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

Am I affected?

Timeline

2009-02-03 19:30 UTCPublished CVE record published
2026-06-16 23:04 UTCUpdated Record last modified

free download manager free download manager DOWNGRADE

Affected: 2.5 · 3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.5

1. Check installed version

apt-cache policy free-download-manager || rpm -q free-download-manager || free-download-manager --version

2. No fixed release: DOWNGRADE to a release before 2.5 (Debian / Ubuntu)

apt-cache madison free-download-manager sudo apt install free-download-manager=<VERSION_BEFORE_2.5> sudo apt-mark hold free-download-manager

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list free-download-manager sudo dnf downgrade free-download-manager-<VERSION_BEFORE_2.5> sudo dnf versionlock add free-download-manager

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.

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: Free Download Manager 2.5/3.0 - Authorisation Stack Buffer Overflow (PoC)
Exploit-DB: Free Download Manager 2.5 Build 758 - Remote Control Server Buffer Overflow (Metasploit)
Metasploit: Free Download Manager Remote Control Server Buffer Overflow

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-2009-0183?

free download manager: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2009-0183 being exploited?

CVE-2009-0183 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-2009-0183 affect?

CVE-2009-0183 affects free download manager. Severity is high (CVSS 10.0). Stack-based buffer overflow in Remote Control Server in Free Download Manager (FDM) 2.5 Build 758 and 3.0 Build 844 allows remote attackers to execute arbitrary code via a long Authorization header in an HTTP request.

How urgent is CVE-2009-0183?

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

Related CVEs

CVE-2014-2087 HIGH 9.3 DOWNGRADE Stack-based buffer overflow in the CDownloads_Deleted::UpdateDownload function in Downloads_Deleted.cpp in Fre
CVE-2010-0999 HIGH 7.1 UPGRADE Directory traversal vulnerability in Free Download Manager (FDM) before 3.0.852 allows remote attackers to cre
CVE-2010-0998 HIGH 10.0 UPGRADE Multiple stack-based buffer overflows in Free Download Manager (FDM) before 3.0.852 allow remote attackers to
CVE-2009-0184 HIGH 9.3 DOWNGRADE Multiple buffer overflows in the torrent parsing implementation in Free Download Manager (FDM) 2.5 Build 758 a

References

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