What is CVE-2020-13586?

CVE-2020-13586 is a high-severity vulnerability in Softmaker Planmaker 2021, classified under Heap-based Buffer Overflow. CVSS score: 7.8/10. Published 2021-02-04.

How severe is CVE-2020-13586?

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

Buffer overflow in Softmaker Planmaker 2021

CVE-2020-13586

A memory corruption vulnerability exists in the Excel Document SST Record 0x00fc functionality of SoftMaker Software GmbH SoftMaker Office PlanMaker 2021 (Revision 1014). A specially crafted malformed file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.

Vulnerability class: Buffer Overflow

Published 2021-02-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.015 (74.6th percentile), scored 2026-10-29.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Softmaker Planmaker 2021 — versions 1014
Softmaker — versions SoftMaker Software GmbH SoftMaker Office PlanMaker 2021 (Revision 1014)

Weakness classification (CWE)

References

talosintelligence.com/vulnerability_reports/TALOS-2020-1197 (Technical Description, Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-13586?: CVE-2020-13586 is a high-severity vulnerability in Softmaker Planmaker 2021, classified under Heap-based Buffer Overflow. CVSS score: 7.8/10. Published 2021-02-04.
How severe is CVE-2020-13586?: High severity. CVSS v3 base score is 7.8 out of 10.