CVE-2026-21389Network attack vector

Authenticated command execution via contacts import injection

Published Feb 27, 2026 · Updated Feb 27, 2026

OS command injection in Copeland XWEB PRO 1.12.1 and earlier allows remote authenticated users to execute operating-system commands. The contacts import route incorporates request-body input into an OS command without neutralizing command separators. A high-privilege authenticated session is required; successful injection executes attacker-chosen commands, while the public record does not identify the process privilege level.

CVSS severity8.0
High
EPSS probability1.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Copeland XWEB PRO 1.12.1 and earlier allows remote authenticated users to execute operating-system commands. The contacts import route incorporates request-body input into an OS command without neutralizing command separators. A high-privilege authenticated session is required; successful injection executes attacker-chosen commands, while the public record does not identify the process privilege level.

The record

CVE
CVE-2026-21389
Published
Feb 27, 2026
Updated
Feb 27, 2026
Vendor
Copeland LP
Product
XWEB 300D PRO
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.12.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Copeland LP · XWEB 300D PROversion=0 <=1.12.1
Copeland LP · XWEB 500D PROversion=0 <=1.12.1
Copeland LP · XWEB 500B PROversion=0 <=1.12.1

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.0ICS-CERTCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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