What is the CVSS score of CVE-2026-20902?

CVE-2026-20902 has a CVSS 3.1 base score of 8.0 (High). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.3%.

Which versions of Xweb 300d Pro Firmware are affected by CVE-2026-20902?

A high-severity remote code execution vulnerability in XWEB Pro versions 1.12.1 and earlier allows authenticated users to execute arbitrary commands on affected systems through malicious file…

How to fix or mitigate CVE-2026-20902?

Within 24 hours: Identify and inventory all systems running XWEB Pro 1.12.1 or earlier; disable the map upload feature if operationally feasible and implement WAF rules to block malicious payloads in the parameters route. Within 7 days: Restrict map upload access to only trusted administrative users; implement enhanced logging and monitoring on the parameters route for suspicious activity. Within 30 days: Upgrade XWEB Pro to a patched version when available; conduct a security audit of affected systems for signs of compromise.

Xweb 300d Pro Firmware CVE-2026-20902

HIGH

OS Command Injection (CWE-78)

2026-02-27 ics-cert@hq.dhs.gov

RCE Command Injection Xweb 300d Pro Firmware Xweb 500b Pro Firmware Xweb 500d Pro Firmware

8.0

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.0 HIGH

AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

CVE Published

Feb 27, 2026 - 01:16 nvd

HIGH 8.0

DescriptionCVE.org

An OS command injection

vulnerability exists in XWEB Pro version 1.12.1 and prior, enabling an authenticated attacker to achieve remote code execution on the system by injecting malicious input into the map filename field during the map upload action of the parameters route.

AnalysisAI

Remote code execution in Xweb 300d Pro, 500b Pro, and 500d Pro firmware (version 1.12.1 and prior) allows authenticated attackers to execute arbitrary OS commands by injecting malicious payloads into the map filename field during file upload operations. An attacker with valid credentials can exploit this command injection flaw to gain full system control. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Authenticate to XWEB Pro

Exploit

Access map upload parameters route

Execution

Inject OS commands into map filename field

Impact

Execute arbitrary commands as application user

Access

Authenticate to XWEB Pro

Exploit

Access map upload parameters route

Execution

Inject OS commands into map filename field

Impact

Execute arbitrary commands as application user

Vulnerability AssessmentAI

Exploitation	XWEB Pro version 1.12.1 or earlier with map upload functionality enabled. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	CVSS 8.0 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	A remote attacker (requires authentication) could exploit this vulnerability to compromise the affected system.
Remediation	Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Identify and inventory all systems running XWEB Pro 1.12.1 or earlier; disable the map upload feature if operationally feasible and implement WAF rules to block malicious payloads in the parameters route. …

Threat intelligence, references, and detailed analysis are available after sign-in.