Buffer overflow in H3c Magic B3
CVE-2025-10942
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (54.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- H3c Magic B3 — versions 100R002
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, vdb-entry)
- vuldb.com/ (signature, permissions-required)
- vuldb.com/ (third-party-advisory)
- vuldb.com/ (third-party-advisory)
- github.com/lin-3-start/lin-cve/blob/main/H3C+Magic+B3/H3C routers Buffer overfl… (related)
- github.com/lin-3-start/lin-cve/blob/main/H3C+Magic+B3/H3C routers Buffer overfl… (exploit)
Frequently asked questions
- What is CVE-2025-10942?
- CVE-2025-10942 is a high-severity vulnerability in H3c Magic B3, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2025-09-25.
- How severe is CVE-2025-10942?
- High severity. CVSS v3 base score is 8.8 out of 10.