CVE-2026-21389

Copeland XWEB and XWEB Pro OS Command Injection

HIGH
8.8
CVSS Score
Published: February 27, 2026 at 12:38 AM UTC
Updated: June 17, 2026 at 10:18 AM UTC
3 products affected across 1 vendorXweb 500B Pro FirmwareXweb 300D Pro FirmwareXweb 500D Pro Firmware

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Severity
HIGH8.8
Exploit prediction
EPSS 2%
SSVC
No known exploit

Description

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 request body sent to the contacts import route.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 1.12.1
copeland-xweb-300d-pro (same device)
v ≤ 1.12.1
copeland-xweb-500b-pro (same device)
v ≤ 1.12.1
copeland-xweb-500d-pro (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-78

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