What is CVE-2018-1000033?

CVE-2018-1000033 is a critical-severity vulnerability in Info-Zip Unzip, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2018-02-09.

How severe is CVE-2018-1000033?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Out-of-bounds Read in Info-Zip Unzip

CVE-2018-1000033

An out-of-bounds read exists in Info-Zip UnZip version 6.10c22 that allows an attacker to perform a denial of service and read sensitive memory.

Vulnerability class: Buffer Overflow

Published 2018-02-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.017 (76.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 76.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Info-Zip Unzip — versions 6.10c22

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

sec-consult.com/en/blog/advisories/multiple-vulnerabilities-in-infozip-unzip/in… (Third Party Advisory)
www.securityfocus.com/bid/103031 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2018-1000033?: CVE-2018-1000033 is a critical-severity vulnerability in Info-Zip Unzip, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2018-02-09.
How severe is CVE-2018-1000033?: Critical severity. CVSS v3 base score is 9.1 out of 10.