CVE-2012-5975

Exp

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.

Published: 2012-12-04 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2012-5975 is rated High Exploit Risk (91.6/100): CVSS Critical severity, with high exploitation likelihood (EPSS 35.87%, 98th percentile). 3 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +10.13% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2012-5975

EDB-ID Source Kind Published Link
23156 exploit_db edb 2012-12-05 Exploit-DB ↗
23082 exploit_db edb 2012-12-02 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2012-5975

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 25.75% 35.87% +10.13%
2 2025-03-30 37.72% 25.75% -11.97%
3 2025-03-29 — 37.72% —

Full EPSS history (26 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2012-5975

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2012-5975

Affected software / configurations for CVE-2012-5975

Vendor Product Version Raw CPE
ssh tectia_server 6.0.4 cpe:2.3:a:ssh:tectia_server:6.0.4:*:*:*:*:*:*:*
ssh tectia_server 6.0.5 cpe:2.3:a:ssh:tectia_server:6.0.5:*:*:*:*:*:*:*
ssh tectia_server 6.0.6 cpe:2.3:a:ssh:tectia_server:6.0.6:*:*:*:*:*:*:*
ssh tectia_server 6.0.7 cpe:2.3:a:ssh:tectia_server:6.0.7:*:*:*:*:*:*:*
ssh tectia_server 6.0.8 cpe:2.3:a:ssh:tectia_server:6.0.8:*:*:*:*:*:*:*
ssh tectia_server 6.0.9 cpe:2.3:a:ssh:tectia_server:6.0.9:*:*:*:*:*:*:*
ssh tectia_server 6.0.10 cpe:2.3:a:ssh:tectia_server:6.0.10:*:*:*:*:*:*:*
ssh tectia_server 6.0.11 cpe:2.3:a:ssh:tectia_server:6.0.11:*:*:*:*:*:*:*
ssh tectia_server 6.0.12 cpe:2.3:a:ssh:tectia_server:6.0.12:*:*:*:*:*:*:*
ssh tectia_server 6.0.13 cpe:2.3:a:ssh:tectia_server:6.0.13:*:*:*:*:*:*:*
ssh tectia_server 6.0.14 cpe:2.3:a:ssh:tectia_server:6.0.14:*:*:*:*:*:*:*
ssh tectia_server 6.0.17 cpe:2.3:a:ssh:tectia_server:6.0.17:*:*:*:*:*:*:*
ssh tectia_server 6.0.18 cpe:2.3:a:ssh:tectia_server:6.0.18:*:*:*:*:*:*:*
ssh tectia_server 6.0.19 cpe:2.3:a:ssh:tectia_server:6.0.19:*:*:*:*:*:*:*
ssh tectia_server 6.0.20. cpe:2.3:a:ssh:tectia_server:6.0.20.:*:*:*:*:*:*:*
ssh tectia_server 6.1.0 cpe:2.3:a:ssh:tectia_server:6.1.0:*:*:*:*:*:*:*
ssh tectia_server 6.1.1 cpe:2.3:a:ssh:tectia_server:6.1.1:*:*:*:*:*:*:*
ssh tectia_server 6.1.2 cpe:2.3:a:ssh:tectia_server:6.1.2:*:*:*:*:*:*:*
ssh tectia_server 6.1.3 cpe:2.3:a:ssh:tectia_server:6.1.3:*:*:*:*:*:*:*
ssh tectia_server 6.1.4 cpe:2.3:a:ssh:tectia_server:6.1.4:*:*:*:*:*:*:*
ssh tectia_server 6.1.5 cpe:2.3:a:ssh:tectia_server:6.1.5:*:*:*:*:*:*:*
ssh tectia_server 6.1.6 cpe:2.3:a:ssh:tectia_server:6.1.6:*:*:*:*:*:*:*
ssh tectia_server 6.1.7 cpe:2.3:a:ssh:tectia_server:6.1.7:*:*:*:*:*:*:*
ssh tectia_server 6.1.8 cpe:2.3:a:ssh:tectia_server:6.1.8:*:*:*:*:*:*:*
ssh tectia_server 6.1.9 cpe:2.3:a:ssh:tectia_server:6.1.9:*:*:*:*:*:*:*
ssh tectia_server 6.1.12 cpe:2.3:a:ssh:tectia_server:6.1.12:*:*:*:*:*:*:*
ssh tectia_server 6.2.0 cpe:2.3:a:ssh:tectia_server:6.2.0:*:*:*:*:*:*:*
ssh tectia_server 6.2.1 cpe:2.3:a:ssh:tectia_server:6.2.1:*:*:*:*:*:*:*
ssh tectia_server 6.2.2 cpe:2.3:a:ssh:tectia_server:6.2.2:*:*:*:*:*:*:*
ssh tectia_server 6.2.3 cpe:2.3:a:ssh:tectia_server:6.2.3:*:*:*:*:*:*:*
ssh tectia_server 6.2.4 cpe:2.3:a:ssh:tectia_server:6.2.4:*:*:*:*:*:*:*
ssh tectia_server 6.2.5 cpe:2.3:a:ssh:tectia_server:6.2.5:*:*:*:*:*:*:*
ssh tectia_server 6.3.0 cpe:2.3:a:ssh:tectia_server:6.3.0:*:*:*:*:*:*:*
ssh tectia_server 6.3.1 cpe:2.3:a:ssh:tectia_server:6.3.1:*:*:*:*:*:*:*
ssh tectia_server 6.3.2 cpe:2.3:a:ssh:tectia_server:6.3.2:*:*:*:*:*:*:*

References for CVE-2012-5975

cvelogic Threat Intelligence