CVE-2012-5975

CRITICAL ⚠ Exploit

The SSH USERAUTH CHANGE REQUEST feature in SSH Tectia Server 6.0.4 through 6.0.20, 6.1.0 through 6.1.12, 6.2.0 through 6.2.5, and 6.3.0 through 6.3.2 on UNIX and Linux, when old-style password auth...

Affects 2 products across 2 vendors.

CVSS 2.09.3
EPSS35.9%
Percentile98th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network.
CWE Weakness Definitions
CWE-287: Improper Authentication

Software does not prove or insufficiently proves that the user is who they claim to be.

Related Attack Patterns (CAPEC)
CAPEC-57 Utilizing REST's Trust in the System Resource to Obtain Sensitive Data
via CWE-287
CAPEC-633 Token Impersonation
via CWE-287
CAPEC-650 Upload a Web Shell to a Web Server
via CWE-287
CAPEC-194 Fake the Source of Data
via CWE-287
CAPEC-593 Session Hijacking
via CWE-287
Show all 10

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ AI Analysis — automated analysis, not human-reviewed

A vulnerability in the SSH USERAUTH CHANGE REQUEST feature of SSH Tectia Server allows remote attackers to bypass authentication by using a crafted session with blank passwords.

BSID: BS-2012-GLOBAL-158826-C • Model: /workspace/models/qwen2.5-coder-32b-instruct-bf16 • Confidence: HIGH

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Frequently Asked Questions
What is CVE-2012-5975?
A vulnerability in the SSH USERAUTH CHANGE REQUEST feature of SSH Tectia Server allows remote attackers to bypass authentication by using a crafted session with blank passwords.
What is the CVSS score for CVE-2012-5975?
CVE-2012-5975 has CVSS 9.3 (Critical). Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C. EPSS: 35.9%.
Is CVE-2012-5975 actively exploited?
Public exploit available for CVE-2012-5975. Exploitation risk elevated.
How do I remediate CVE-2012-5975?
Priority: IMMEDIATE.
What systems are affected by CVE-2012-5975?
CVE-2012-5975 affects Ssh Tectia Server.
Vulnerability Details
CVE IDCVE-2012-5975
BSIDBS-2012-GLOBAL-158826-C BreachSpider Global ID
CVSS VectorAV:N/AC:M/Au:N/C:C/I:C/A:C
Published2012-12-04
Last Modified2026-06-16
ICS Relevance15%
Weakness (CWE)
Improper Authentication
SourceNVD
Official Description

The SSH USERAUTH CHANGE REQUEST feature in SSH Tectia Server 6.0.4 through 6.0.20, 6.1.0 through 6.1.12, 6.2.0 through 6.2.5, and 6.3.0 through 6.3.2 on UNIX and Linux, when old-style password authentication is enabled, allows remote attackers to bypass authentication via a crafted session involving entry of blank passwords, as demonstrated by a root login session from a modified OpenSSH client with an added input_userauth_passwd_changereq call in sshconnect2.c.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

The attack involves a remote attacker using a modified OpenSSH client to initiate a session with the SSH Tectia Server where old-style password authentication is enabled. By entering blank passwords, the attacker can potentially gain unauthorized access, including root login.

Exploitation Likelihood: HIGH

Affected Products
VendorProductAffected Versions
Ssh Tectia Server 6.0.4 6.0.5 6.0.6 6.0.7 6.0.8 6.0.9
+29 more6.0.10 6.0.11 6.0.12 6.0.13 6.0.14 6.0.17 6.0.18 6.0.19 6.0.20. 6.1.0 6.1.1 6.1.2 6.1.3 6.1.4 6.1.5 6.1.6 6.1.7 6.1.8 6.1.9 6.1.12 6.2.0 6.2.1 6.2.2 6.2.3 6.2.4 6.2.5 6.3.0 6.3.1 6.3.2

Platforms listed by the source (the vulnerable product runs on these; they are not themselves vulnerable): Linux Linux Kernel

Remediation

No official vendor advisory link on record. See the CVE record →

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 5063 Days
CISA known-exploitedNot in KEV catalog
Public Exploit⚠ Available — Reference
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Model/workspace/models/qwen2.5-coder-32b-instruct-bf16
ConfidenceHIGH
Enriched At2026-05-24
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