# CVE-2026-89052: TP-Link Archer C6 hardcoded encryption key credential disclosure

Source: https://junglewise.ai/threats/cve-2026-89052-a-hardcoded-cryptographic-key-management-vulnerability-exists-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-21. Updated: 2026-10-21  
License: CC BY 4.0 with a link back

CVE-2026-89052 · Severity: info · Published 2026-10-21

The TP-Link Archer C6 wireless router uses a shared hardcoded encryption key across all devices to protect configuration files and credentials. An attacker with access to an encrypted configuration file can decrypt it to extract administrative passwords and other sensitive information, potentially gaining control of the router and the home or office network it serves.

Vendors: [TP-Link](https://junglewise.ai/threats/vendors/tp-link).

## Quick answers

**Is CVE-2026-89052 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-89052 being exploited in the wild.

**How severe is CVE-2026-89052?** Informational severity, published 21 October 2026.

**Which products and versions are affected?** TP-Link Archer C6 V2 prior to 1.2.1 Build 260902.

**Is there a fix for CVE-2026-89052?** Yes: fixed in Archer C6 V2: firmware 1.2.1 Build 260902 and later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-89052 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-89052?** Check whether you run TP-Link Archer C6 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in Archer C6 V2: firmware 1.2.1 Build 260902 and later

## Technical details

A hardcoded AES encryption key shared across all Archer C6 devices allows an attacker who obtains an encrypted configuration backup or other protected credential data to derive plaintext administrative credentials and sensitive information. The vulnerability requires an attacker to have prior access to the encrypted configuration file (network attack vector with preconditions) or physical device access. Firmware version 1.2.1 Build 260902 and later for Archer C6 V2 contain the fix.

## Affected products

- TP-Link Archer C6 V2 prior to 1.2.1 Build 260902

## Timeline

- 2026-10-21: disclosed

## References

- [https://www.tp-link.com/us/support/download/archer-c6/v2/](https://www.tp-link.com/us/support/download/archer-c6/v2/)
- [https://www.tp-link.com/us/support/faq/5356/](https://www.tp-link.com/us/support/faq/5356/)