Remote Code Execution Vulnerability in aaPanel BillionMail Relay Configuration API
CVE-2026-124579

5.3MEDIUM

Key Information:

Vendor

Aapanel

Status
Billionmail
Vendor
CVE Published:
9 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-124579?

A vulnerability has been identified in the Relay Configuration API of aaPanel BillionMail up to version 4.9. An attacker can exploit this issue by manipulating the 'helo_name' argument, which can lead to remote injection attacks. Despite the vendor being notified of this concern, there has been no response. The exploit has been publicly disclosed and poses a significant risk for users who have not yet updated to a patched version.

Affected Version(s)

BillionMail 4.0

BillionMail 4.1

BillionMail 4.2

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-2026-124579 - Proof of Concept

References

https://vuldb.com/vuln/432929
vdb-entrytechnical-description
https://vuldb.com/vuln/432929/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-124579
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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

silverdragon (VulDB User)
VulDB CNA Team
.