CVE-2020-11058Network attack vector

Peer disconnect via undersized font capability length

Published May 12, 2020 · Updated Aug 4, 2024

Out-of-bounds read in FreeRDP after 1.1 and before 2.0.0 allows remote authenticated users to disconnect an RDP peer. rdp_read_font_capability_set accepts five- and seven-byte capability lengths before seeking two bytes, advancing the stream beyond its buffer. Reaching the parser requires an established RDP connection and yields only an invalid-read disconnect, with no reported data disclosure.

CVSS severity2.2
Low
EPSS probability1.61%
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 read in FreeRDP after 1.1 and before 2.0.0 allows remote authenticated users to disconnect an RDP peer. rdp_read_font_capability_set accepts five- and seven-byte capability lengths before seeking two bytes, advancing the stream beyond its buffer. Reaching the parser requires an established RDP connection and yields only an invalid-read disconnect, with no reported data disclosure.

The record

CVE
CVE-2020-11058
Published
May 12, 2020
Updated
Aug 4, 2024
Vendor
FreeRDP
Product
FreeRDP
Classifications
CWE-125, CWE-119, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 12, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=> 1.1, < 2.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FreeRDP · FreeRDPversion=> 1.1, < 2.0.0

Published CVSS scores

2.2GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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