CVE-2026-40187Public exploitNetwork attack vector

Administrator command execution via unescaped template backticks

Published Jul 20, 2026 · Updated Jul 20, 2026

Command injection in EGroupware affected releases allows remote authenticated users with administrator access to execute shell commands. Widget::expand_name inserts template attributes into PHP eval while escaping only double quotes, so backticks invoke shell_exec. Exploitation requires an administrator-controlled .xet upload and shell_exec enabled; affected branches are before 23.1.20260601 and 26.0.20251208 through 26.0.20260112.

CVSS severity8.6
High
EPSS probability0.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Command injection in EGroupware affected releases allows remote authenticated users with administrator access to execute shell commands. Widget::expand_name inserts template attributes into PHP eval while escaping only double quotes, so backticks invoke shell_exec. Exploitation requires an administrator-controlled .xet upload and shell_exec enabled; affected branches are before 23.1.20260601 and 26.0.20251208 through 26.0.20260112.

The record

CVE
CVE-2026-40187
Published
Jul 20, 2026
Updated
Jul 20, 2026
Vendor
EGroupware GmbH
Product
EGroupware
Classifications
CWE-78, CWE-95, T1059.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 20, 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=<= 26.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

EGroupware GmbH · EGroupwareversion=<= 26.0

Published CVSS scores

8.6GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-95Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo