Siemens SICAM A8000 Out-of-bounds Write (CVE-2026-27664)

high Tenable OT Security Plugin ID 505330

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability has been identified in CPCI85 Central Processing/Communication (All versions < V26.10).
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.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

Plugin Details

Severity: High

ID: 505330

File Name: tenable_ot_siemens_CVE-2026-27664.nasl

Version: 1.1

Type: Remote

Family: Tenable.ot

Published: 4/21/2026

Updated: 4/21/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v3

Risk Factor: High

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v4

Risk Factor: High

Base Score: 8.7

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:siemens:cp-8031_firmware, cpe:/o:siemens:cp-8050_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 3/26/2026

Vulnerability Publication Date: 3/26/2026

Reference Information

CVE: CVE-2026-27664

CWE: 787

ICSA: 26-092-01

Detections

Analytics