Vulnerability · Published Sep 25, 2025 · Assigned by VulDB

CVE-2025-10942H3C Magic B3 aspForm EditMacList buffer overflow

High 8.8

In plain English

A high-severity buffer overflow in Magic B3 from H3C. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.8%top 41.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was identified in H3C Magic B3 up to 100R002. This affects the function AddMacList/EditMacList of the file /goform/aspForm. The manipulation of the argument param leads to buffer overflow. The attack can be initiated remotely. The exploit is publicly available and might 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 B3	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-325812 | H3C Magic B3 aspForm EditMacList buffer overflow vdb-entry, technical-description
VDB-325812 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #651813 | H3C Magic B3 <=100R002 Buffer Overflow third-party-advisory
Submit #684667 | H3C Magic B3 Router V100R002 Buffer Overflow (Duplicate) third-party-advisory
https://github.com/lin-3-start/lin-cve/blob/main/H3C%2BMagic%2BB3/H3C%20routers%20Buffer%20overflow.md related
https://github.com/lin-3-start/lin-cve/blob/main/H3C%2BMagic%2BB3/H3C%20routers%20Buffer%20overflow.md#poc exploit