CVE-2003-0302: The IMAP Client for Eudora 5.2.1 allows remote malicious IMAP servers to cause a denial of service and possibl

Routine

MEDIUM 5.0DOWNGRADE

CVE-2003-0302 is a medium-severity flaw (CVSS 5.0) affecting eudora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The IMAP Client for Eudora 5.2.1 allows remote malicious IMAP servers to cause a denial of service and possibly execute arbitrary code via certain large literal size values that cause either integer signedness errors or integer overflow errors.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Published	2003-06-16
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: qualcomm

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

Am I affected?

Timeline

2003-06-16 04:00 UTCPublished CVE record published
2026-06-16 22:01 UTCUpdated Record last modified

qualcomm eudora DOWNGRADE

Affected: 5.2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.2.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.2.1 (Debian / Ubuntu)

apt-cache madison eudora sudo apt install eudora=<VERSION_BEFORE_5.2.1> sudo apt-mark hold eudora

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

dnf --showduplicates list eudora sudo dnf downgrade eudora-<VERSION_BEFORE_5.2.1> sudo dnf versionlock add eudora

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.

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-2003-0302?

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

Is CVE-2003-0302 being exploited?

CVE-2003-0302 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-2003-0302 affect?

CVE-2003-0302 affects eudora. Severity is medium (CVSS 5.0). The IMAP Client for Eudora 5.2.1 allows remote malicious IMAP servers to cause a denial of service and possibly execute arbitrary code via certain large literal size values that cause either integer signedness errors or integer overflow err

How urgent is CVE-2003-0302?

Priority 35/100. No elevated risk signals yet.

Software pages

Qualcomm vulnerabilities

Related CVEs

CVE-2007-3166 MEDIUM 6.8 DOWNGRADE Buffer overflow in Qualcomm Eudora 7.1.0.9 allows user-assisted, remote IMAP servers to execute arbitrary code
CVE-2007-2770 HIGH 9.3 DOWNGRADE Stack-based buffer overflow in Eudora 7.1 allows user-assisted, remote SMTP servers to execute arbitrary code
CVE-2004-2649 MEDIUM 5.8 DOWNGRADE Eudora 6.1.0.6 allows remote attackers to obfuscate URLs displayed in the status bar by inserting a large numb
CVE-2004-2005 MEDIUM 5.1 DOWNGRADE Buffer overflow in Eudora for Windows 5.2.1, 6.0.3, and 6.1 allows remote attackers to execute arbitrary code
CVE-2004-1944 MEDIUM 5.0 DOWNGRADE Eudora 6.1 and 6.0.3 for Windows allows remote attackers to cause a denial of service (crash) via a deeply nes

References

← Back to latest CVEs