Vulnerability · Published Apr 19, 2026 · Assigned by VulDB

CVE-2026-6581H3C Magic B1 aspForm SetMobileAPInfoById buffer overflow

High 8.8

In plain English

A high-severity buffer overflow in Magic B1 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 detected in H3C Magic B1 up to 100R004. Affected by this vulnerability is the function SetMobileAPInfoById of the file /goform/aspForm. Performing a manipulation of the argument param results in buffer overflow. Remote exploitation of the attack is possible. The exploit is now public and may 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 B1	100R004

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-358216 | H3C Magic B1 aspForm SetMobileAPInfoById buffer overflow vdb-entry, technical-description
VDB-358216 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #790977 | New H3C Magic B1 <=100R004 buffer overflow third-party-advisory
https://github.com/hmKunlun/H3Cc/blob/main/h3c.md exploit