How severe is CVE-2025-27494?

CVE-2025-27494 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-27494 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-27494?

CVE-2025-27494 primarily affects Siemens Sipass Integrated Ac5102 (acc-g2) Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-27494?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-27494 have an EU (EUVD) identifier?

Yes. CVE-2025-27494 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7785.

When was CVE-2025-27494 published?

CVE-2025-27494 was published on 2025-03-11 and last updated on 2026-06-17.

CVE-2025-27494

CVE-2025-27494 is a critical-severity vulnerability in Siemens Sipass Integrated Ac5102 (acc-g2) Firmware with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v4: 9.4
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-7785
Weakness: CWE-20
Affected product: Siemens Sipass Integrated Ac5102 (acc-g2) Firmware
Published: 2025-03-11
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2025-27494?: 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.
How severe is CVE-2025-27494?: CVE-2025-27494 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-27494 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-27494?: CVE-2025-27494 primarily affects Siemens Sipass Integrated Ac5102 (acc-g2) Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-27494?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-27494 have an EU (EUVD) identifier?: Yes. CVE-2025-27494 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7785.
When was CVE-2025-27494 published?: CVE-2025-27494 was published on 2025-03-11 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/html/ssa-515903.html

Affected products (2)

cpe:2.3:o:siemens:sipass_integrated_ac5102_\(acc-g2\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:sipass_integrated_acc-ap_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Siemens Sipass Integrated Ac5102 (acc-g2) Firmware

CVE-2025-27493 — High (CVSS 8.2): A vulnerability has been identified in SiPass integrated AC5102 (ACC-G2) (All versions < V6.4.9), SiPass integrated…
CVE-2022-31808 — High (CVSS 7.8): A vulnerability has been identified in SiPass integrated AC5102 (ACC-G2) (All versions < V2.85.44), SiPass integrated…
CVE-2022-31807 — Medium (CVSS 6.2): A vulnerability has been identified in Building X - Security Manager Edge Controller (ACC-AP) (All versions). Affected…

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