Vulnerability · Published May 24, 2026 · Assigned by VulDB

CVE-2026-9393H3C Magic B0 aspForm Edit_BasicSSID_5G buffer overflow

High 8.8

In plain English

A high-severity buffer overflow in Magic B0 from H3C. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.4%top 61.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was found in H3C Magic B0 up to 100R002. This affects the function Edit_BasicSSID_5G of the file /goform/aspForm. Performing a manipulation of the argument param results in buffer overflow. The attack may be initiated remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products (as reported)

Vendor	Product	Versions
H3C	Magic B0	100R002

Weakness: CWE-120, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-365374 | H3C Magic B0 aspForm Edit_BasicSSID_5G buffer overflow vdb-entry, technical-description
VDB-365374 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #813477 | New H3C Technologies Co., Ltd. H3C Magic B0 <= 100R002 Buffer Overflow third-party-advisory
https://github.com/alc9700jmo/CVE/issues/25 exploit, issue-tracking