CVE-2020-13581

Code execution via unchecked record length copy

Published Feb 10, 2021 · Updated Aug 4, 2024

Heap-based buffer overflow in PlanMaker 2021 Revision 1014 allows attackers to execute code via a crafted PlanMaker document. The record 0x800d handler trusts the document-supplied record length and passes it to memcpy after allocating only 2,048 heap bytes. A victim must open the document; an oversized record corrupts process memory and can execute code with the application's privileges.

CVSS severity7.8
High
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in PlanMaker 2021 Revision 1014 allows attackers to execute code via a crafted PlanMaker document. The record 0x800d handler trusts the document-supplied record length and passes it to memcpy after allocating only 2,048 heap bytes. A victim must open the document; an oversized record corrupts process memory and can execute code with the application's privileges.

The record

CVE
CVE-2020-13581
Published
Feb 10, 2021
Updated
Aug 4, 2024
Vendor
SoftMaker Software GmbH
Product
PlanMaker
Classifications
CWE-122, CWE-787, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 10, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=SoftMaker Software GmbH SoftMaker Office PlanMaker 2021 (Revision 1014)

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

SoftMaker Software GmbH · PlanMakerversion=SoftMaker Software GmbH SoftMaker Office PlanMaker 2021 (Revision 1014)

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8Cisco TalosCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CWE-787Out-of-bounds Write
T1204.002User Execution: Malicious File
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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