What is CVE-2018-18957?

CVE-2018-18957 is a critical-severity vulnerability in Mz-Automation Libiec61850, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2018-11-05.

How severe is CVE-2018-18957?

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

Buffer overflow in Mz-Automation Libiec61850

CVE-2018-18957

An issue has been found in libIEC61850 v1.3. It is a stack-based buffer overflow in prepareGooseBuffer in goose/goose_publisher.c.

Vulnerability class: Buffer Overflow

Published 2018-11-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.116 (95.9th percentile), scored 2026-09-30.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.116 · newest: 0.116 · change: 0.000

Affected products

Mz-Automation Libiec61850 — versions 1.3

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

www.exploit-db.com/exploits/45798/ (Exploit, VDB Entry, Third Party Advisory, exploit)
github.com/mz-automation/libiec61850/issues/83 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-18957?: CVE-2018-18957 is a critical-severity vulnerability in Mz-Automation Libiec61850, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2018-11-05.
How severe is CVE-2018-18957?: Critical severity. CVSS v3 base score is 9.8 out of 10.