Which products and versions are affected by CVE-2012-5975?

Affected: Tectia Server (SSH) versions 6.0.10, 6.0.11, 6.0.12, 6.0.13, 6.0.14, 6.0.17, 6.0.18, 6.0.19. The full list is in the CVE brief.

Is CVE-2012-5975 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2012-5975 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2012-5975?

Public exploit code is available.

Is there a fix for CVE-2012-5975?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2012-5975 be patched?

Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Request A Demo

Emerging threatsCritical

CVE-2012-5975Tectia Server Authentication Bypass

Published Dec 4, 2012 · Updated Apr 28, 2026

Key Facts

Patch immediately

CVE-2012-5975 is a critical-severity vulnerability (CVSS 9.3 v2) affecting Tectia Server (SSH).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 36% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Scores

CVSS v2

9.3

AV:N/AC:M/Au:N/C:C/I:C/A:C

EPSS (30-day exploit likelihood)

36%

Higher than 98.4% of all scored CVEs

Exploit maturity

Weaponized

ATLAS score

55/100

Publication score, see How it works

Exploitation Verdict

KEV listed

Not listed

Federal due date

None

No federal due date

Ransomware use

Not reported

Attributed actors

None named

Exploit & Defence Guidance

Exploit maturity

Weaponized

Public exploit code

Proof-of-concept links

In-the-wild evidence

Reports of active use

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.

Affected Products

35 affected entries in total

Product	Affected versions	Fixed in
Tectia ServerSSH	6.0.10, 6.0.11, 6.0.12, 6.0.13, 6.0.14, 6.0.17, 6.0.18, 6.0.19	n/a

Timeline

Publicly disclosed
Dec 4, 2012
Last updated
Apr 28, 2026

Weakness Type

CWE-287 Improper Authentication

References

1 more references in the full CVE brief

FAQ

Common Questions.

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 pas…
Affected: Tectia Server (SSH) versions 6.0.10, 6.0.11, 6.0.12, 6.0.13, 6.0.14, 6.0.17, 6.0.18, 6.0.19. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Is CVE-2012-5975 On Your Attack Surface?

Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.