OS Command Injection Vulnerability in OpenSpug File Transfer by OpenSpug
CVE-2026-108540

9.4CRITICAL

Key Information:

Vendor

Openspug

Status
Spug
Vendor
CVE Published:
11 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-108540?

A vulnerability has been identified in the File Transfer component of OpenSpug, specifically affecting versions 3.4.0 and 4.0.1. This flaw allows remote execution of unauthorized OS commands through the manipulation of the /exec/transfer file. Due to the nature of the exploit, attackers can potentially gain control over the underlying operating system, posing significant risks to system integrity and security. Despite early notification to the vendor regarding this issue, no response has been received, leaving the affected systems exposed to potential exploitation.

Affected Version(s)

Spug 3.0

Spug 3.1

Spug 3.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-108540 - Proof of Concept

References

https://vuldb.com/vuln/416195
vdb-entry
https://vuldb.com/vuln/416195/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-108540
third-party-advisory

CVSS V4

Score:
9.4
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

WenGui (VulDB User)
VulDB CNA Team
.