CVE-2025-68118Network attack vector

Heap over-read via unterminated certificate-cache filename

Published Dec 17, 2025 · Updated Dec 17, 2025

Out-of-bounds read in FreeRDP before 3.20.0 allows remote attackers to crash Windows clients or read adjacent heap memory. freerdp_certificate_data_hash_ formats an attacker-controlled hostname into a certificate-cache filename with _snprintf, which can leave the buffer unterminated after truncation. A malicious RDP server or crafted .rdp file can supply the hostname; default connections usually terminate before useful data is exposed.

CVSS severity9.1
Critical
EPSS probability0.24%
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 before 3.20.0 allows remote attackers to crash Windows clients or read adjacent heap memory. freerdp_certificate_data_hash_ formats an attacker-controlled hostname into a certificate-cache filename with _snprintf, which can leave the buffer unterminated after truncation. A malicious RDP server or crafted .rdp file can supply the hostname; default connections usually terminate before useful data is exposed.

The record

CVE
CVE-2025-68118
Published
Dec 17, 2025
Updated
Dec 17, 2025
Vendor
FreeRDP
Product
FreeRDP
Classifications
CWE-125, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 17, 2025Record 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=< 3.20.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FreeRDP · FreeRDPversion=< 3.20.0

Published CVSS scores

0.0GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:N
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
6.6GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Application 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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