What is CVE-1999-0006?

CVE-1999-0006 is a critical-severity vulnerability in Qualcomm Qpopper, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 1998-07-14.

How severe is CVE-1999-0006?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Out-of-bounds Read in Qualcomm Qpopper

CVE-1999-0006

Buffer overflow in POP servers based on BSD/Qualcomm's qpopper allows remote attackers to gain root access using a long PASS command.

Vulnerability class: Buffer Overflow

Published 1998-07-14 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.121 (96.0th percentile), scored 2026-09-29.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.119 · newest: 0.121 · change: +0.002

Affected products

Qualcomm Qpopper — versions 2.4

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

www.securityfocus.com/bid/133 (vdb-entry)

Frequently asked questions

What is CVE-1999-0006?: CVE-1999-0006 is a critical-severity vulnerability in Qualcomm Qpopper, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 1998-07-14.
How severe is CVE-1999-0006?: Critical severity. CVSS v3 base score is 9.8 out of 10.