What is CVE-2018-15807?

CVE-2018-15807 is a high-severity vulnerability in Posim Evo, classified under Use of Insufficiently Random Values. CVSS score: 7.8/10. Published 2018-08-23.

How severe is CVE-2018-15807?

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

Vulnerability in Posim Evo

CVE-2018-15807

POSIM EVO 15.13 for Windows includes an "Emergency Override" administrative account that may be accessed through POSIM's "override" feature. This Override prompt expects a code that is computed locally using a deterministic algorithm. This code may be generated by an attacker and used to bypass any POSIM EVO login prompt.

Published 2018-08-23 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.003 (25.1th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Posim Evo — versions 15.13

Weakness classification (CWE)

CWE-330 — Use of Insufficiently Random Values

References

versprite.com/advisories/posim-evo-for-windows/ (Third Party Advisory)

Frequently asked questions

What is CVE-2018-15807?: CVE-2018-15807 is a high-severity vulnerability in Posim Evo, classified under Use of Insufficiently Random Values. CVSS score: 7.8/10. Published 2018-08-23.
How severe is CVE-2018-15807?: High severity. CVSS v3 base score is 7.8 out of 10.