# CVE-2026-86153: Tenda CP3 privilege escalation in redirect server

Source: https://junglewise.ai/threats/cve-2026-86153-tenda-cp3-privilege-escalation-in-redirect-server  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-06. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-86153 · Severity: critical · CVSS 9.1 · Published 2026-09-06

Tenda CP3, a wireless network access point/router, contains a privilege management flaw in its redirect server component. An attacker can exploit this remotely to gain elevated privileges, potentially gaining full control of the device and the networks it manages. This could lead to unauthorized network access, data interception, or device compromise.

Technologies: [Tenda CP3](https://junglewise.ai/threats/technologies/cp3). Vendors: [Tenda](https://junglewise.ai/threats/vendors/tenda).

## Quick answers

**Is CVE-2026-86153 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-86153 being exploited in the wild.

**How severe is CVE-2026-86153?** Critical severity, with a CVSS score of 9.1, published 6 September 2026.

**Which products and versions are affected?** Tenda CP3 27.5.57.101.

**Is there a fix for CVE-2026-86153?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-86153 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-86153?** Check whether you run Tenda CP3 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.

## Technical details

The vulnerability exists in the CRedirServer::SetRedirectEnable function within Functions/Redirect.cpp of Tenda CP3 firmware version 27.5.57.101. The flaw involves improper privilege management, allowing an unauthenticated remote attacker to escalate privileges or bypass access controls. The attack is remotely exploitable without requiring special preconditions. Successful exploitation grants an attacker elevated privileges on the affected device. A patch or updated firmware version should be available from Tenda.

## Affected products

- Tenda CP3 27.5.57.101

## Timeline

- 2026-09-06: disclosed

## References

- [https://vuldb.com/cve/CVE-2026-86153](https://vuldb.com/cve/CVE-2026-86153)
- [https://vuldb.com/submit/895354](https://vuldb.com/submit/895354)

## Related threats

- [Tenda CP3 OS command injection in AutoAddWifi](https://junglewise.ai/threats/cve-2026-86152-tenda-cp3-os-command-injection-in-autoaddwifi)
- [Tenda CP3 OS command injection in Network Configuration Management](https://junglewise.ai/threats/cve-2026-86151-tenda-cp3-os-command-injection-in-network-configuration)
- [Tenda CP3 hard-coded credentials in hostapd configuration](https://junglewise.ai/threats/cve-2026-86150-tenda-cp3-hard-coded-credentials-in-hostapd-configuration)
- [Tenda CP3 OS command injection via interface_name argument](https://junglewise.ai/threats/cve-2026-86149-tenda-cp3-os-command-injection-via-interface-name-argument)
- [Tenda CP3 OS command injection in SystemAsh](https://junglewise.ai/threats/cve-2026-86148-tenda-cp3-os-command-injection-in-systemash)