What is CVE-2018-1000031?

CVE-2018-1000031 is a high-severity vulnerability in Info-Zip Unzip, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2018-02-09.

How severe is CVE-2018-1000031?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Info-Zip Unzip

CVE-2018-1000031

A heap-based buffer overflow exists in Info-Zip UnZip version 6.10c22 that allows an attacker to perform a denial of service or to possibly achieve code execution.

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (69.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Info-Zip Unzip — versions 6.10c22

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

sec-consult.com/en/blog/advisories/multiple-vulnerabilities-in-infozip-unzip/in… (Third Party Advisory)

Frequently asked questions

What is CVE-2018-1000031?: CVE-2018-1000031 is a high-severity vulnerability in Info-Zip Unzip, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2018-02-09.
How severe is CVE-2018-1000031?: High severity. CVSS v3 base score is 7.8 out of 10.