Siemens LOGO! 12 buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.2$5k-$25k0.00

Summaryinfo

A vulnerability was found in Siemens LOGO! 12, 24RCE, 24RCEo, LOGO! 230RCE, LOGO! 230RCEo, LOGO! 24CE, LOGO! 24CEo, LOGO! 24RCE, LOGO! 24RCEo, SIPLUS LOGO! 12, SIPLUS LOGO! 230RCE, SIPLUS LOGO! 230RCEo, SIPLUS LOGO! 24CE, SIPLUS LOGO! 24CEo, SIPLUS LOGO! 24RCE and SIPLUS LOGO! 24RCEo. It has been rated as critical. This affects an unknown part. This manipulation causes buffer overflow. The identification of this vulnerability is CVE-2025-40815. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in Siemens LOGO! 12, 24RCE, 24RCEo, LOGO! 230RCE, LOGO! 230RCEo, LOGO! 24CE, LOGO! 24CEo, LOGO! 24RCE, LOGO! 24RCEo, SIPLUS LOGO! 12, SIPLUS LOGO! 230RCE, SIPLUS LOGO! 230RCEo, SIPLUS LOGO! 24CE, SIPLUS LOGO! 24CEo, SIPLUS LOGO! 24RCE and SIPLUS LOGO! 24RCEo and classified as critical. Affected by this vulnerability is an unknown function. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability has been identified in LOGO! 12/24RCE (6ED1052-1MD08-0BA2) (All versions), LOGO! 12/24RCEo (6ED1052-2MD08-0BA2) (All versions), LOGO! 230RCE (6ED1052-1FB08-0BA2) (All versions), LOGO! 230RCEo (6ED1052-2FB08-0BA2) (All versions), LOGO! 24CE (6ED1052-1CC08-0BA2) (All versions), LOGO! 24CEo (6ED1052-2CC08-0BA2) (All versions), LOGO! 24RCE (6ED1052-1HB08-0BA2) (All versions), LOGO! 24RCEo (6ED1052-2HB08-0BA2) (All versions), SIPLUS LOGO! 12/24RCE (6AG1052-1MD08-7BA2) (All versions), SIPLUS LOGO! 12/24RCEo (6AG1052-2MD08-7BA2) (All versions), SIPLUS LOGO! 230RCE (6AG1052-1FB08-7BA2) (All versions), SIPLUS LOGO! 230RCEo (6AG1052-2FB08-7BA2) (All versions), SIPLUS LOGO! 24CE (6AG1052-1CC08-7BA2) (All versions), SIPLUS LOGO! 24CEo (6AG1052-2CC08-7BA2) (All versions), SIPLUS LOGO! 24RCE (6AG1052-1HB08-7BA2) (All versions), SIPLUS LOGO! 24RCEo (6AG1052-2HB08-7BA2) (All versions). Affected devices do not properly validate the structure of TCP packets in several methods. This could allow an attacker to cause buffer overflows, get control over the instruction counter and run custom code.

It is possible to read the advisory at cert-portal.siemens.com. This vulnerability is known as CVE-2025-40815 since 04/16/2025. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 11/12/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at CNNVD (CNNVD-202511-993). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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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: 7.2
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.2
VulDB Temp Score: 7.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.2
CNA Vector (siemens): 🔒

CVSSv2info

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

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

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: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/16/2025 CVE reserved
11/12/2025 +210 days Advisory disclosed
11/12/2025 +0 days VulDB entry created
11/12/2025 +0 days VulDB entry last update

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-267056
Status: Confirmed

CVE: CVE-2025-40815 (🔒)
GCVE (CVE): GCVE-0-2025-40815
GCVE (VulDB): GCVE-100-332059
CNNVD: CNNVD-202511-993 - Siemens多款产品 安全漏洞

Entryinfo

Created: 11/12/2025 07:24
Updated: 11/12/2025 16:09
Changes: 11/12/2025 07:24 (73), 11/12/2025 16:09 (6)
Complete: 🔍
Cache ID: 216::103

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