CVE-2003-1339: Stack-based buffer overflow in eZnet.exe, as used in eZ (a) eZphotoshare, (b) eZmeeting, (c) eZnetwork, and (d

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HIGH 10.0DOWNGRADE

CVE-2003-1339 is a high-severity flaw (CVSS 10.0) affecting ezmeeting. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stack-based buffer overflow in eZnet.exe, as used in eZ (a) eZphotoshare, (b) eZmeeting, (c) eZnetwork, and (d) eZshare allows remote attackers to cause a denial of service (crash) or execute arbitrary code, as demonstrated via (1) a long GET request and (2) a long operation or autologin parameter to SwEzModule.dll.

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	48.6% (top 1%)
CISA exploited list	No
Weakness	CWE-119
Published	2003-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: ezmeeting

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

Am I affected?

Timeline

2003-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:03 UTCUpdated Record last modified

ezmeeting ezmeeting DOWNGRADE

Affected: 3.3 · 3.4 · 3.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.3 (Debian / Ubuntu)

apt-cache madison ezmeeting sudo apt install ezmeeting=<VERSION_BEFORE_3.3> sudo apt-mark hold ezmeeting

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

dnf --showduplicates list ezmeeting sudo dnf downgrade ezmeeting-<VERSION_BEFORE_3.3> sudo dnf versionlock add ezmeeting

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: Eznet 3.5.0 - Remote Stack Overflow / Denial of Service
Exploit-DB: Eznet 3.5.0 - Remote Stack Overflow Universal

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-2003-1339?

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

Is CVE-2003-1339 being exploited?

CVE-2003-1339 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-2003-1339 affect?

CVE-2003-1339 affects ezmeeting. Severity is high (CVSS 10.0). Stack-based buffer overflow in eZnet.exe, as used in eZ (a) eZphotoshare, (b) eZmeeting, (c) eZnetwork, and (d) eZshare allows remote attackers to cause a denial of service (crash) or execute arbitrary code, as demonstrated via (1) a long G

How urgent is CVE-2003-1339?

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

References

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