CVE-2020-11866

Local code execution via malformed metafile

Published May 11, 2020 · Updated Aug 4, 2024

Use-after-free in libEMF 1.0.11 and earlier allows local users to execute code by supplying a malformed EMF file. The upstream disclosure does not identify the affected parser function, freed object, or stale access within the EMF-processing path. A consuming application must parse the crafted file, so exploitation requires user interaction or an equivalent local file-processing path.

CVSS severity7.8
High
EPSS probability1.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in libEMF 1.0.11 and earlier allows local users to execute code by supplying a malformed EMF file. The upstream disclosure does not identify the affected parser function, freed object, or stale access within the EMF-processing path. A consuming application must parse the crafted file, so exploitation requires user interaction or an equivalent local file-processing path.

The record

CVE
CVE-2020-11866
Published
May 11, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 11, 2020CVE 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.0SUSECVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

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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-416Use After Free
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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