Buffer Overflow Vulnerability in H3C GR-5400AX Router
CVE-2025-5156

8.7HIGH

Key Information:

Vendor

H3c
Status
Gr-5400ax
Vendor
CVE Published:
25 May 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-5156?

A buffer overflow vulnerability exists in the EditWlanMacList function of the H3C GR-5400AX router, specifically within the routing/goform/aspForm file. This issue allows an attacker to manipulate parameters, potentially enabling remote exploitation. The vulnerability has been publicly disclosed, and the vendor has not responded to initial notifications of this security concern. Users are advised to monitor their networks for unusual activity and apply necessary security measures to mitigate risks.

Affected Version(s)

GR-5400AX 100R008

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-2025-5156 - Proof of Concept

References

https://vuldb.com/?id.310244
vdb-entrytechnical-description
https://vuldb.com/?ctiid.310244
signaturepermissions-required
https://vuldb.com/?submit.574080
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

DaddyShark (VulDB User)
.