CVE-2020-11524Network attack vector

Memory corruption via interleaved codec write

Published May 15, 2020 · Updated Aug 4, 2024

Out-of-bounds write in FreeRDP versions 1.0 through 2.0.0-rc4 allows attackers to corrupt memory via unspecified vectors. The libfreerdp/codec/interleaved.c decoder writes beyond a destination buffer while processing untrusted interleaved codec data; public records do not describe the specific missing bounds operation. The published assessment requires high privileges and no user interaction, and the record establishes memory corruption but does not establish code execution or a particular crash outcome.

CVSS severity6.6
Medium
EPSS probability1.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in FreeRDP versions 1.0 through 2.0.0-rc4 allows attackers to corrupt memory via unspecified vectors. The libfreerdp/codec/interleaved.c decoder writes beyond a destination buffer while processing untrusted interleaved codec data; public records do not describe the specific missing bounds operation. The published assessment requires high privileges and no user interaction, and the record establishes memory corruption but does not establish code execution or a particular crash outcome.

The record

CVE
CVE-2020-11524
Published
May 15, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 15, 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 vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.6NVDCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
6.6Rapid7CVSS:3.1/AV:N/AC:H/PR:H/UI:N/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.

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)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

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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