Siemens SINUMERIK ONE V6.15 authentication bypass

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Siemens SINUMERIK 828D PPU.4, SINUMERIK 828D PPU.5, SINUMERIK 840D sl, SINUMERIK MC, SINUMERIK MC V1.15, SINUMERIK ONE and SINUMERIK ONE V6.15. It has been declared as critical. Affected by this vulnerability is an unknown functionality. Executing a manipulation can lead to authentication bypass. This vulnerability appears as CVE-2025-40743. The attacker needs to be present on the local network. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Siemens SINUMERIK 828D PPU.4, SINUMERIK 828D PPU.5, SINUMERIK 840D sl, SINUMERIK MC, SINUMERIK MC V1.15, SINUMERIK ONE and SINUMERIK ONE V6.15. This vulnerability affects some unknown processing. The manipulation with an unknown input leads to a authentication bypass vulnerability. The CWE definition for the vulnerability is CWE-288. A product requires authentication, but the product has an alternate path or channel that does not require authentication. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A vulnerability has been identified in SINUMERIK 828D PPU.4 (All versions < V4.95 SP5), SINUMERIK 828D PPU.5 (All versions < V5.25 SP1), SINUMERIK 840D sl (All versions < V4.95 SP5), SINUMERIK MC (All versions < V1.25 SP1), SINUMERIK MC V1.15 (All versions < V1.15 SP5), SINUMERIK ONE (All versions < V6.25 SP1), SINUMERIK ONE V6.15 (All versions < V6.15 SP5). The affected application improperly validates authentication for its VNC access service, allowing access with insufficient password verification. This could allow an attacker to gain unauthorized remote access and potentially compromise system confidentiality, integrity, or availability.

The advisory is shared for download at cert-portal.siemens.com. This vulnerability was named CVE-2025-40743 since 04/16/2025. The exploitation appears to be easy. Access to the local network is required for this attack to succeed. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/12/2025).

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

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License

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.1

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.3
CNA Vector (siemens): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Authentication bypass
CWE: CWE-288 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/16/2025 CVE reserved
08/12/2025 +118 days Advisory disclosed
08/12/2025 +0 days VulDB entry created
08/12/2025 +0 days VulDB entry last update

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-177847
Status: Confirmed

CVE: CVE-2025-40743 (🔒)
GCVE (CVE): GCVE-0-2025-40743
GCVE (VulDB): GCVE-100-319528

Entryinfo

Created: 08/12/2025 13:51
Changes: 08/12/2025 13:51 (74)
Complete: 🔍
Cache ID: 216::103

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