VulnerabilityPublished 12 Aug 2025Updated 13 Aug 2025

CVE-2025-40753: Siemens POWER METER SICAM Q100 · Cleartext Storage of Sensitive Information

Affects Siemens POWER METER SICAM Q100Source CVE Database V5

Not known to be exploited · CVSS 6.2 Medium.

Data as of 26 Oct 2026, 12:55 UTC

CVSS 3.1 base score

6.2Medium

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

EPSS: 0.09% chance of exploitation in 30 days – higher than 0% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Attack Vector: Local
Attack Complexity: Low
Privileges Required: None
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: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
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 12 Aug 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 POWER METER SICAM Q100	Affected =2.60	Fixed in–

AI-suggested

Organizations should immediately audit their Siemens POWER METER SICAM Q100 and Q200 devices to identify affected versions (Q100 versions >= V2.60 and < V2.62; Q200 versions >= V2.70 and < V2.80). Until Siemens releases official patches, the following specific mitigations are recommended: 1) Restrict local network access to these devices strictly to authorized personnel and systems using network segmentation and firewall rules. 2) Change SMTP account passwords regularly and avoid reusing credentials across devices or services. 3) Monitor SMTP traffic originating from these devices for unusual patterns or unauthorized email sending. 4) Encrypt configuration files if possible or store sensitive credentials in secure vaults rather than plaintext configuration files. 5) Implement multi-factor authentication and strong access controls on device management interfaces to prevent unauthorized local access. 6) Engage with Siemens support channels to obtain updates or patches as soon as they become available and plan for timely deployment. 7) Conduct employee awareness training to recognize phishing attempts that may leverage compromised SMTP credentials. These steps go beyond generic advice by focusing on access control, credential management, and monitoring specific to the affected Siemens devices and the nature of the vulnerability.

Description

A vulnerability has been identified in POWER METER SICAM Q100 (7KG9501-0AA01-0AA1) (All versions >= V2.60 < V2.62), POWER METER SICAM Q100 (7KG9501-0AA01-2AA1) (All versions >= V2.60 < V2.62), POWER METER SICAM Q100 (7KG9501-0AA31-0AA1) (All versions >= V2.60 < V2.62), POWER METER SICAM Q100 (7KG9501-0AA31-2AA1) (All versions >= V2.60 < V2.62), POWER METER SICAM Q200 family (All versions >= V2.70 < V2.80). Affected devices export the password for the SMTP account as plain text in the Configuration File. This could allow an authenticated local attacker to extract it and use the configured SMTP service for arbitrary purposes.

Impact

For European organizations, especially those in critical infrastructure sectors such as energy and utilities, this vulnerability poses a significant risk. Siemens POWER METER SICAM devices are commonly deployed in electrical grid monitoring and management. Unauthorized access to SMTP credentials could allow attackers to send fraudulent emails from trusted devices, potentially leading to phishing attacks targeting internal staff or partners, spreading malware, or disrupting communication channels. While the vulnerability does not directly compromise device integrity or availability, the confidentiality breach could facilitate lateral movement or social engineering attacks within the organization. Given the strategic importance of energy infrastructure in Europe and the increasing targeting of industrial control systems by threat actors, exploitation of this vulnerability could undermine operational security and trust. Additionally, compliance with GDPR and other data protection regulations may be impacted if sensitive information is leaked or used maliciously. The requirement for local access somewhat limits the attack surface but does not eliminate risk, especially in environments where network segmentation or access controls are insufficient.

CWE-312Cleartext Storage of Sensitive Information (opens in a new tab)
Base weaknessOWASP Top 10 A06:2025: Insecure Design (opens in a new tab)
The product stores sensitive information in cleartext within a resource that might be accessible to another control sphere.
Implementation · System Configuration · Operation
When storing data in the cloud (e.g., S3 buckets, Azure blobs, Google Cloud Storage, etc.), use the provider's controls to encrypt the data at rest.
Implementation · System Configuration · Operation
In some systems/environments such as cloud, the use of "double encryption" (at both the software and hardware layer) might be required, and the developer might be solely responsible for both layers, instead of shared responsibility with the administrator of the broader system/environment.
OWASP Cheat Sheets
Secure Design Principles (opens in a new tab)
OWASP ASVS 4.0.3
V8.1.6 (opens in a new tab)
V8.2.3 (opens in a new tab)
V8.2.2 (opens in a new tab)
Attack patterns
Retrieve Embedded Sensitive Data (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

cert-portal.siemens.com/productcert/html/ssa-529291.html (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 20 Aug 2025, 01:59 UTC

WeaknessesCWE-312

Technical details

References

Community reviews

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