# CVE-2026-82542: Tenda HG10 buffer overflow in formIPv6Routing

Source: https://junglewise.ai/threats/cve-2026-82542-tenda-hg10-buffer-overflow-in-formipv6routing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-30. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-82542 · Severity: critical · CVSS 10 · Published 2026-08-30

The Tenda HG10 router's web-based administration interface contains a buffer overflow vulnerability in its IPv6 routing configuration function. An attacker can send a specially crafted request over the network to cause the device to crash or potentially execute arbitrary code, disrupting network connectivity and potentially compromising the router entirely.

Technologies: [Tenda HG10](https://junglewise.ai/threats/technologies/hg10). Vendors: [Tenda](https://junglewise.ai/threats/vendors/tenda).

## Quick answers

**Is CVE-2026-82542 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-82542 being exploited in the wild.

**How severe is CVE-2026-82542?** Critical severity, with a CVSS score of 10, published 30 August 2026.

**Which products and versions are affected?** Tenda HG10 300001138 (AC1200).

**Is there a fix for CVE-2026-82542?** 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-2026-82542 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-82542?** Check whether you run Tenda HG10 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

A buffer overflow vulnerability exists in the Boa web server's formIPv6Routing function (entry address 0x004648CC) within the Tenda HG10 router. The vulnerable code uses strcpy() to copy the user-supplied destNet HTTP parameter into a fixed-size buffer without length validation. An attacker can submit an overlong destNet value via a POST request to /boaform/admin/formIPv6Routing to overflow the buffer and overwrite adjacent memory. The attack is remotely exploitable without authentication or user interaction, and exploitation has been confirmed to cause denial-of-service; arbitrary code execution may be possible depending on memory layout and runtime protections. Public exploit code is available.

## Affected products

- Tenda HG10 300001138 (AC1200)

## Timeline

- 2026-08-30: disclosed: CVE-2026-82542 published

## References

- [https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/Tenda/HG10/bof-formIPv6Route-destNt.md](https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/Tenda/HG10/bof-formIPv6Route-destNt.md)
- [https://vuldb.com/cve/CVE-2026-82542](https://vuldb.com/cve/CVE-2026-82542)

## Related threats

- [Tenda HG7/HG9/HG10 stack buffer overflow in formLoopBack](https://junglewise.ai/threats/cve-2026-104610-a-security-vulnerability-has-been-detected-in-tenda-hg7-hg9-and)
- [Tenda HG10 OS command injection in formgponConf](https://junglewise.ai/threats/cve-2026-86167-tenda-hg10-os-command-injection-in-formgponconf)
- [Tenda HG10 buffer overflow in formWanRedirect](https://junglewise.ai/threats/cve-2026-86166-tenda-hg10-buffer-overflow-in-formwanredirect)
- [Tenda HG10 buffer overflow in formURL](https://junglewise.ai/threats/cve-2026-86165-tenda-hg10-buffer-overflow-in-formurl)
- [Tenda HG10 buffer overflow in formWlanSetup SSID parameter](https://junglewise.ai/threats/cve-2026-85110-tenda-hg10-buffer-overflow-in-formwlansetup-ssid-parameter)