CVE-2000-0931: Buffer overflow in Pegasus Mail 3.11 allows remote attackers to cause a denial of service and possibly execute

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HIGH 7.5DOWNGRADE

CVE-2000-0931 is a high-severity flaw (CVSS 7.5) affecting pegasus mail. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in Pegasus Mail 3.11 allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long email message containing binary data.

Why this priority

High severity

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	2.0% (top 19%)
CISA exploited list	No
Published	2000-12-19
Last modified	2026-09-25

Publisher (CNA): MITRE · Vendor: david harris

Last updated 2026-09-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2000-12-19 05:00 UTCPublished CVE record published
2026-09-25 17:10 UTCUpdated Record last modified

david harris pegasus mail DOWNGRADE

Affected: 3.11

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.11

1. Check installed version

apt-cache policy pegasus-mail || rpm -q pegasus-mail || pegasus-mail --version

2. No fixed release: DOWNGRADE to a release before 3.11 (Debian / Ubuntu)

apt-cache madison pegasus-mail sudo apt install pegasus-mail=<VERSION_BEFORE_3.11> sudo apt-mark hold pegasus-mail

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

dnf --showduplicates list pegasus-mail sudo dnf downgrade pegasus-mail-<VERSION_BEFORE_3.11> sudo dnf versionlock add pegasus-mail

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-2000-0931?

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

Is CVE-2000-0931 being exploited?

CVE-2000-0931 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-2000-0931 affect?

CVE-2000-0931 affects pegasus mail. Severity is high (CVSS 7.5). Buffer overflow in Pegasus Mail 3.11 allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long email message containing binary data.

How urgent is CVE-2000-0931?

Priority 47/100. High severity

Related CVEs

CVE-2000-0930 MEDIUM 5.0 DOWNGRADE Pegasus Mail 3.12 allows remote attackers to read arbitrary files via an embedded URL that calls the mailto: p
CVE-2009-3838 HIGH 9.3 DOWNGRADE Stack-based buffer overflow in Pegasus Mail (PMail) 4.41 and possibly 4.51 allows remote POP3 servers to cause
CVE-2002-1075 HIGH 7.5 UPGRADE Buffer overflow in Pegasus mail client 4.01 and earlier allows remote attackers to cause a denial of service (
CVE-1999-1366 LOW 3.6 UPGRADE Pegasus e-mail client 3.0 and earlier uses weak encryption to store POP3 passwords in the pmail.ini file, whic

References

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