CVE-2025-14821— Libssh: libssh: insecure default configuration leads to local man-in-the-middle attacks on windows
Quick assessment
Affected
Red Hat Red Hat Hardened Images
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
libssh是libssh组织的一个用于访问SSH服务的C语言开发包，它能够执行远程命令、文件传输，同时为远程的程序提供安全的传输通道。 libssh存在安全漏洞，该漏洞源于Windows系统上不安全的默认配置，可能导致本地中间人攻击、SSH连接安全降级和受信任主机信息被操纵。
Possible ATT&CK Techniques 3 AI
T1114 · Email Collection T1113 · Screen Capture T1557 · Adversary-in-the-MiddleAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | any |
unaffected |
| Red Hat | Red Hat Enterprise Linux 6 | any |
unaffected |
| Red Hat | Red Hat Enterprise Linux 7 | any |
unaffected |
| Red Hat | Red Hat Enterprise Linux 8 | any |
unaffected |
| Red Hat | Red Hat Enterprise Linux 9 | any |
unaffected |
| Red Hat | Red Hat Hardened Images | 0.12.0-1.1.hum1< * |
unaffected |
| Red Hat | Red Hat OpenShift Container Platform 4 | any |
unaffected |
any |
unaffected |
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I. Basic Information for CVE-2025-14821
Vulnerability Information
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Vulnerability Title
Libssh: libssh: insecure default configuration leads to local man-in-the-middle attacks on windows
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in libssh. This vulnerability allows local man-in-the-middle attacks, security downgrades of SSH (Secure Shell) connections, and manipulation of trusted host information, posing a significant risk to the confidentiality, integrity, and availability of SSH communications via an insecure default configuration on Windows systems where the library automatically loads configuration files from the C:\etc directory, which can be created and modified by unprivileged local users.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对搜索路径元素未加控制
Source: CVE Program / CVE List V5
Vulnerability Title
libssh 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libssh是libssh组织的一个用于访问SSH服务的C语言开发包，它能够执行远程命令、文件传输，同时为远程的程序提供安全的传输通道。 libssh存在安全漏洞，该漏洞源于Windows系统上不安全的默认配置，可能导致本地中间人攻击、SSH连接安全降级和受信任主机信息被操纵。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Hardened Images | 0.12.0-1.1.hum1 ~ * |
cpe:/a:redhat:hummingbird:1
|
|
| Red Hat | Red Hat Enterprise Linux 10 | - |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 | - |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 | - |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 | - |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 | - |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 | - |
cpe:/a:redhat:openshift:4
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 | - |
cpe:/a:redhat:openshift:4
|
|
II. Public POCs for CVE-2025-14821
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2025-14821 (2)
Same Patch Batch · Red Hat · 2026-04-07 · 4 CVEs total
| CVE-2026-4631 | 9.8 CRITICAL | Cockpit: cockpit: unauthenticated remote code execution due to ssh command-line argument i |
| CVE-2026-4740 | 8.2 HIGH | Rhacm: open cluster management (ocm): cross-cluster privilege escalation via improper kube |
| CVE-2026-5745 | 5.5 MEDIUM | Libarchive: a null pointer dereference vulnerability exists in the acl parser of libarchiv |
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V. Comments for CVE-2025-14821
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