Vulnerability · CVE-2025-40806
A vulnerability has been identified in Gridscale X Prepay (All versions < V4.2.1).
Published Dec 9, 2025 · catalog updated Dec 9, 2025 · Siemens Gridscale X Prepay
Last checked Nov 2, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2025-40806. EPSS is 0.46%. Act only if a listed version of Siemens Gridscale X Prepay is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2025-40807 · Medium
- Severity
- Medium6.9
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.46%
- Remediation
- Version ranges on file
- Affected products
- vendor Siemens Gridscale X Prepay 0 <V4.2.1
A vulnerability has been identified in Gridscale X Prepay (All versions < V4.2.1). The affected application is vulnerable to user enumeration due to distinguishable responses. This could allow an unauthenticated remote attacker to determine if a user is valid or not, enabling a brute force attack with valid users.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Siemens Gridscale X Prepay 0 <V4.2.10 <V4.2.1
How to fix CVE-2025-40806
Upgrade
CVE-2025-40806 lists a fix boundary at V4.2.1. Compare the installed build with that boundary before you change production.
Version check
Seen in 0 <V4.2.1
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2025-40806. EPSS is 0.46%. Act only if a listed version of Siemens Gridscale X Prepay is installed.
Which versions are affected?
Compare what you have installed with Siemens Gridscale X Prepay 0 <V4.2.1 0 <V4.2.1. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.46%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Dec 9, 2025 · EUVD
Detected
A vulnerability has been identified in Gridscale X Prepay (All versions < V4.2.1). The affected application is vulnerable to user enumeration due to distinguishable responses. This could allow an unauthenticated remote attacker to determine if a user is valid or not, enabling a brute force attack with valid users.
Dec 9, 2025 · EUVD
Updated
A vulnerability has been identified in Gridscale X Prepay (All versions < V4.2.1). The affected application is vulnerable to user enumeration due to distinguishable responses. This could allow an unauthenticated remote attacker to determine if a user is valid or not, enabling a brute force attack with valid users.
Sources
- CVE.orgVulnerability recordCVE-2025-40806
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-40806
30-day exploitation probability 0.46%
first.org - EUVDVulnerability recordEUVD-2025-201927
A vulnerability has been identified in Gridscale X Prepay (All versions < V4.2.1). The affected application is vulnerable to user enumeration due to distinguishable responses. This could allow an unauthenticated remote attacker to determine if a user is valid or not, enabling a b
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Nov 2, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSNov 2, 2026
- CVE.orgOct 27, 2026
- EUVDOct 27, 2026