Is CVE-2026-27664 actively exploited?

No active exploitation of CVE-2026-27664 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-27664 be exploited remotely?

Yes. CVE-2026-27664 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27664?

CVE-2026-27664 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-27664

HIGH

CVE-2026-27664

CWE-787Published: March 26, 2026· Updated: Mar 30, 2026

7.5

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:11.6th

Official Description

A vulnerability has been identified in CPCI85 Central Processing/Communication (All versions < V26.10), SICORE Base system (All versions < V26.10.0). The affected application contains an out-of-bounds write vulnerability while parsing specially crafted XML inputs. This could allow an unauthenticated attacker to exploit this issue by sending a malicious XML request, which may cause the service to crash, resulting in a denial-of-service condition.

NVD Source

Technical Analysis

CVE-2026-27664 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

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News & Research Mentioning CVE-2026-27664

Siemens SICAM 8 Products

CISA Alerts· Apr 2, 2026

View CSAF Summary Multiple SICAM 8 products are affected by multiple vulnerabilities that could lead to denial of service, namely: - SICAM A8000 Device firmware - CPCI85 for CP-8031/CP-8050 - SICORE for CP-8010/CP-8012 - RTUM85 for CP-8010/CP-8012 - SICAM EGS Device firmware - CPCI85 - SICAM S8000 - SICORE - RTUM85 Siemens has released new versions for the affected products and recommends to update to the latest versions. The following versions of Siemens SICAM 8 Products are affected: CPCI85 Central Processing/Communication vers:intdot/<26.10 (CVE-2026-27663, CVE-2026-27664) RTUM85 RTU Base vers:intdot/<26.10 (CVE-2026-27663) SICORE Base system vers:intdot/<26.10.0 (CVE-2026-27664) CVSS Vendor Equipment Vulnerabilities v3 7.5 Siemens Siemens SICAM 8 [xlite_meta score:73 src:CISA Alerts xlite_fp:7d25bfddb354b705fe5c9e2f90b0fda6044567079e507fd69f252859b63e0409]