# CVE-2026-113802: Wavlink WL-WN530BE1-A OS command injection in protocol.csp

Source: https://junglewise.ai/threats/cve-2026-113802-wavlink-wl-wn530be1-a-firmware-through-m30be1-v251117-contains  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-20. Updated: 2026-10-20  
License: CC BY 4.0 with a link back

CVE-2026-113802 · Severity: critical · CVSS 9.8 · Published 2026-10-20

Wavlink's WL-WN530BE1-A is a residential WiFi router that provides network connectivity and VPN support. The firmware contains a critical flaw that allows attackers to remotely execute arbitrary commands as root without authentication by forging an IP header and injecting commands into a request parameter. An attacker can fully compromise the router, steal credentials and data, or use it as a persistent foothold for network attacks.

Technologies: [Wavlink WL-WN530BE1-A](https://junglewise.ai/threats/technologies/wl-wn530be1-a). Vendors: [Wavlink](https://junglewise.ai/threats/vendors/wavlink).

## Quick answers

**Is CVE-2026-113802 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-113802 being exploited in the wild.

**How severe is CVE-2026-113802?** Critical severity, with a CVSS score of 9.8, published 20 October 2026.

**Which products and versions are affected?** Wavlink WL-WN530BE1-A through M30BE1_V251117.

**Is there a fix for CVE-2026-113802?** 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.

**Am I affected by CVE-2026-113802?** Check whether you run Wavlink WL-WN530BE1-A 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

An OS command injection vulnerability exists in the ioos binary's sub_23B54 function, which concatenates an unsanitized file_id parameter from /protocol.csp?opt=ovpn_file requests (with type=del) into a shell command passed to popen(). The vulnerability is unauthenticated because the ioos binary trusts the IP-FROM HTTP header to determine if requests originate from localhost, allowing an attacker to forge this header to bypass login checks. No credentials or user interaction are required; network access alone is sufficient for exploitation.

## Affected products

- Wavlink WL-WN530BE1-A through M30BE1_V251117

## Timeline

- 2026-10-20: disclosed

## References

- [https://github.com/F-yyjy/cve/blob/main/WN530BE1(en).md](https://github.com/F-yyjy/cve/blob/main/WN530BE1(en).md)
- [https://www.vulncheck.com/advisories/wavlink-wl-wn530be1-a-unauthenticated-os-command-injection-in-ioos-protocol-csp-ovpn-file-handler](https://www.vulncheck.com/advisories/wavlink-wl-wn530be1-a-unauthenticated-os-command-injection-in-ioos-protocol-csp-ovpn-file-handler)

## Related threats

- [WAVLINK WL-WN530BE1-A command injection in protocol.csp](https://junglewise.ai/threats/cve-2026-120198-a-vulnerability-has-been-found-in-wavlink-wl-wn530be1-a-v251117)
- [Wavlink WL-WN530BE1-A stack-based buffer overflow in settings export](https://junglewise.ai/threats/cve-2026-109109-a-vulnerability-was-detected-in-wavlink-wl-wn530be1-a-251117)
- [Wavlink WL-WN530BE1-A OS command injection in uploadVpn](https://junglewise.ai/threats/cve-2026-109108-a-security-vulnerability-has-been-detected-in-wavlink-wl)