What is the CVSS score of CVE-2026-25721?

CVE-2026-25721 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: 0.1%.

How to fix or mitigate CVE-2026-25721?

Within 24 hours: Inventory all XWEB Pro deployments and identify systems running version 1.12.1 or earlier; disable the restore API endpoint (V1 route) if operationally feasible. Within 7 days: Restrict API access to this endpoint via network firewall rules, limiting access to trusted administrative networks only; implement enhanced logging and monitoring on restore function calls. Within 30 days: Contact vendor for patch availability and plan upgrade; if patch released, prioritize deployment; if unavailable, evaluate alternative solutions or consider decommissioning the vulnerable component.

Xweb 500b Pro Firmware CVE-2026-25721

Q: Which versions of Xweb 500b Pro Firmware are affected by CVE-2026-25721?

A critical command injection vulnerability in XWEB Pro versions 1.12.1 and earlier allows authenticated attackers to execute arbitrary code on affected systems through the API restore function.

HIGH

OS Command Injection (CWE-78)

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

RCE Command Injection Xweb 500b Pro Firmware Xweb 300d 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 - 02:16 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 server username and/or password fields of the restore action in the API V1 route.

AnalysisAI

Remote code execution in XWEB Pro firmware versions 1.12.1 and earlier allows authenticated attackers to execute arbitrary OS commands by injecting malicious payloads into the server username or password fields during restore operations via the API V1 endpoint. The vulnerability affects Xweb 300d Pro, 500b Pro, and 500d Pro devices and requires high-level privileges but could compromise the entire system. No patch is currently available for this vulnerability.

Technical ContextAI

Classified as CWE-78 (OS Command Injection). Affects Xweb 300D Pro Firmware. 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 server username and/or password fields of the restore action in the API V1 route.