VulnerabilityPublished 14 Oct 2025

CVE-2025-40774: Siemens SiPass integrated · Storing Passwords in a Recoverable Format

Affects Siemens SiPass integratedSource CVE Database V5

Not known to be exploited · CVSS 4.4 Medium.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score

4.4Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Attack Vector: Local
Attack Complexity: Low
Privileges Required: High
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Local: The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or remotely (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., tricking a legitimate user into opening a malicious document).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: High: The attacker is authorized with (i.e., requires) privileges that provide significant (e.g., administrative) control over the vulnerable component that could affect component-wide settings and files.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 14 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Siemens SiPass integrated	Affected =0	Fixed in–

AI-suggested

To mitigate this vulnerability, European organizations should implement the following specific measures: 1) Restrict and tightly control administrative access to SiPass integrated servers using the principle of least privilege and multi-factor authentication to reduce the risk of credential compromise. 2) Monitor and audit all administrative activities and access to decryption keys or password databases to detect suspicious behavior promptly. 3) Segregate duties so that no single administrator has unrestricted access to both the password database and decryption keys. 4) Encrypt backups and logs containing sensitive credential information to prevent leakage. 5) Prepare for and prioritize upgrading to Siemens SiPass integrated version 3.0 or later once available, where this vulnerability is addressed. 6) Consider implementing additional compensating controls such as network segmentation and endpoint protection to limit lateral movement if credentials are compromised. 7) Conduct regular security awareness training for administrators emphasizing the risks of credential misuse. These targeted actions go beyond generic patching advice and focus on reducing the risk posed by the recoverable password storage design until a patch is deployed.

Description

A vulnerability has been identified in SiPass integrated (All versions < V3.0). Affected server applications store user passwords encrypted in its database. Decryption keys are accessible to users with administrative privileges, allowing them to recover passwords. Successful exploitation of this vulnerability allows an attacker to obtain and use valid user passwords. This can lead to unauthorized access to user accounts, data breaches, and potential system compromise.

Impact

For European organizations, the vulnerability poses a significant insider threat and credential compromise risk. Since administrative users can decrypt passwords, any compromise or misuse of admin accounts can lead to unauthorized access to user accounts and sensitive access control data. This can result in data breaches, unauthorized physical access, and potential disruption of critical infrastructure protected by SiPass integrated. The confidentiality of user credentials is directly impacted, increasing the risk of lateral movement within networks and escalation of privileges. Although the vulnerability does not affect system integrity or availability directly, the indirect consequences of credential theft can be severe, including regulatory non-compliance under GDPR if personal data is exposed. Organizations in sectors such as manufacturing, energy, transportation, and government that use Siemens SiPass integrated for access control are particularly at risk. The medium CVSS score reflects the requirement for administrative privileges, limiting the threat to insiders or attackers who have already compromised admin accounts.

CWE-257Storing Passwords in a Recoverable Format (opens in a new tab)
Base weaknessLikelihood of exploit: HighOWASP Top 10 A04:2021: Insecure Design (opens in a new tab)
The storage of passwords in a recoverable format makes them subject to password reuse attacks by malicious users. In fact, it should be noted that recoverable encrypted passwords provide no significant benefit over plaintext passwords since they are subject not only to reuse by malicious attackers but also by malicious insiders. If a system administrator can recover a password directly, or use a brute force search on the available information, the administrator can use the password on other accounts.
Architecture and Design
Use strong, non-reversible encryption to protect stored passwords.
OWASP ASVS 4.0.3
V2.8.5 (opens in a new tab)
V2.8.4 (opens in a new tab)
V9.2.3 (opens in a new tab)
Attack patterns
Password Brute Forcing (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

cert-portal.siemens.com/productcert/html/ssa-599451.html (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 21 Oct 2025, 11:52 UTC

WeaknessesCWE-257

Technical details

References

Community reviews

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