CVE-1999-1366: Pegasus e-mail client 3.0 and earlier uses weak encryption to store POP3 passwords in the pmail.ini file, whic

Q: How do I fix CVE-1999-1366?

pegasus mail: upgrade to newer than 3.0. Exact commands for each OS are on this page.

Q: Is CVE-1999-1366 being exploited?

CVE-1999-1366 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-1999-1366 affect?

CVE-1999-1366 affects pegasus mail. Severity is low (CVSS 3.6). Pegasus e-mail client 3.0 and earlier uses weak encryption to store POP3 passwords in the pmail.ini file, which allows local users to easily decrypt the passwords and read e-mail.

Q: How urgent is CVE-1999-1366?

Priority 15/100. No elevated risk signals yet.

Routine

LOW 3.6UPGRADE

CVE-1999-1366 is a low-severity flaw (CVSS 3.6) affecting pegasus mail. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Pegasus e-mail client 3.0 and earlier uses weak encryption to store POP3 passwords in the pmail.ini file, which allows local users to easily decrypt the passwords and read e-mail.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.6 (Low)
EPSS exploit chance	0.2% (top 90%)
CISA exploited list	No
Published	1999-05-15
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: david harris

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

Am I affected?

Timeline

1999-05-15 04:00 UTCPublished CVE record published
2026-06-16 21:50 UTCUpdated Record last modified

david harris pegasus mail UPGRADE

Affected: <= 3.0

Fixed in: newer than 3.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 3.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pegasus-mail

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pegasus-mail

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-1999-1366?

pegasus mail: upgrade to newer than 3.0. Exact commands for each OS are on this page.

Is CVE-1999-1366 being exploited?

CVE-1999-1366 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-1999-1366 affect?

CVE-1999-1366 affects pegasus mail. Severity is low (CVSS 3.6). Pegasus e-mail client 3.0 and earlier uses weak encryption to store POP3 passwords in the pmail.ini file, which allows local users to easily decrypt the passwords and read e-mail.

How urgent is CVE-1999-1366?

Priority 15/100. No elevated risk signals yet.

Related CVEs

CVE-2000-0931 HIGH 7.5 DOWNGRADE Buffer overflow in Pegasus Mail 3.11 allows remote attackers to cause a denial of service and possibly execute
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 (

References

← Back to latest CVEs