Buffer Overflow Vulnerability in H3C Magic B0 by H3C Technologies
CVE-2026-9393

8.7HIGH

Key Information:

Vendor

H3c
Status
Magic B0
Vendor
CVE Published:
24 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9393?

A buffer overflow vulnerability exists in the Edit_BasicSSID_5G function of the H3C Magic B0 up to version 100R002. This flaw allows an attacker to manipulate the 'param' argument, potentially leading to remote exploitation. The issue has been disclosed publicly, raising concerns over the security of affected devices. The vendor, H3C Technologies, has been contacted but has not provided a response regarding the vulnerability. Users are advised to review their security posture and monitor for potential attacks.

Affected Version(s)

Magic B0 100R002

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-2026-9393 - Proof of Concept

References

https://vuldb.com/vuln/365374
vdb-entrytechnical-description
https://vuldb.com/vuln/365374/cti
signaturepermissions-required
https://vuldb.com/submit/813477
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
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

alc9700 (VulDB User)
VulDB CNA Team
.