VDB-299262 · CVE-2025-27494 · ssa-515903

Siemens SiPass integrated AC5102/SiPass integrated ACC-AP up to 6.4.8 REST API improper authentication

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.7	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in Siemens SiPass integrated AC5102 and SiPass integrated ACC-AP up to 6.4.8. The impacted element is an unknown function of the component REST API. The manipulation results in improper authentication. This vulnerability is reported as CVE-2025-27494. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in Siemens SiPass integrated AC5102 and SiPass integrated ACC-AP up to 6.4.8. Affected is an unknown code block of the component REST API. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A vulnerability has been identified in SiPass integrated AC5102 (ACC-G2) (All versions < V6.4.9), SiPass integrated ACC-AP (All versions < V6.4.9). Affected devices improperly sanitize input for the pubkey endpoint of the REST API. This could allow an authenticated remote administrator to escalate privileges by injecting arbitrary commands that are executed with root privileges.

The advisory is available at cert-portal.siemens.com. This vulnerability is traded as CVE-2025-27494 since 02/26/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. Additional levels of successful authentication are required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/23/2025).

Upgrading to version 6.4.9 eliminates this vulnerability.

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Productinfo

Vendor

Siemens

Name

Version

License

commercial

Website

Vendor: https://www.siemens.com/

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: 7.8
VulDB Meta Temp Score: 7.7

VulDB Base Score: 7.2
VulDB Temp Score: 6.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.2
NVD Vector: 🔍

CNA Base Score: 9.1
CNA Vector (siemens): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: SiPass integrated AC5102/SiPass integrated ACC-AP 6.4.9

Timelineinfo

02/26/2025 🔍
03/11/2025 +13 days 🔍
03/11/2025 +0 days 🔍
08/23/2025 +165 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-515903
Status: Confirmed

CVE: CVE-2025-27494 (🔍)
GCVE (CVE): GCVE-0-2025-27494
GCVE (VulDB): GCVE-100-299262

Entryinfo

Created: 03/11/2025 11:31
Updated: 08/23/2025 04:06
Changes: 03/11/2025 11:31 (77), 08/23/2025 04:06 (12)
Complete: 🔍
Cache ID: 216::103