# CVE-2026-15513: Wavlink WL-NU516U1 OS command injection in adm.cgi

Source: https://junglewise.ai/threats/cve-2026-15513-wavlink-wl-nu516u1-os-command-injection-in-adm-cgi  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-13. Updated: 2026-07-13  
License: CC BY 4.0 with a link back

CVE-2026-15513 · Severity: medium · CVSS 6.3 · Published 2026-07-13

A security vulnerability has been identified in the Wavlink WL-NU516U1 router, a device used to provide wireless internet connectivity. An attacker could exploit this flaw to take control of the router's operating system, potentially leading to unauthorized access to network traffic or a complete service outage. A fixed version of the firmware has been released by the manufacturer to address this issue.

Technologies: [Wavlink Wl-Nu516u1](https://junglewise.ai/threats/technologies/wl-nu516u1). Vendors: [Wavlink](https://junglewise.ai/threats/vendors/wavlink).

## Quick answers

**Is CVE-2026-15513 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-15513 being exploited in the wild.

**How severe is CVE-2026-15513?** Medium severity, with a CVSS score of 6.3, published 13 July 2026.

**Which products and versions are affected?** Wavlink Wl-Nu516u1 260515.

**Is there a fix for CVE-2026-15513?** A patch was published on 2026-06-22: Vendor released fixed firmware version Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-15513 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-15513?** Check whether you run Wavlink Wl-Nu516u1 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 Wavlink WL-NU516U1 router firmware version 260515. The flaw is located within the 'wlink_uci_set_value' function in '/cgi-bin/adm.cgi' due to improper neutralization of the 'lan_ip' argument before it is passed to a system call. A remote attacker with low privileges can exploit this by sending a specially crafted request to execute arbitrary commands on the underlying Linux operating system. Public exploit code exists, and the vulnerability can reportedly be chained with CSRF to bypass authentication. A firmware update (WINSTAR_NU516U1-WO-A-2026-06-22) is available to remediate the issue.

## Affected products

- Wavlink WL-NU516U1 260515

## Timeline

- 2026-07-13: advisory: NVD publication date
- 2026-06-22: patched: Vendor released fixed firmware version

## References

- [https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-06-22-5ccde97-mt7628-squashfs-sysupgrade.bin](https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-06-22-5ccde97-mt7628-squashfs-sysupgrade.bin)
- [https://github.com/0xcc12138/wavlink-nu516u1-csrf-command-injection-](https://github.com/0xcc12138/wavlink-nu516u1-csrf-command-injection-)
- [https://vuldb.com/cve/CVE-2026-15513](https://vuldb.com/cve/CVE-2026-15513)
- [https://vuldb.com/submit/847517](https://vuldb.com/submit/847517)
- [https://vuldb.com/vuln/377842](https://vuldb.com/vuln/377842)
- [https://vuldb.com/vuln/377842/cti](https://vuldb.com/vuln/377842/cti)

## Related threats

- [Wavlink NU516U1 OS command injection in adm.cgi](https://junglewise.ai/threats/cve-2026-8192-wavlink-nu516u1-os-command-injection-in-adm-cgi)
- [Wavlink NU516U1 command injection in adm.cgi](https://junglewise.ai/threats/cve-2026-8191-wavlink-nu516u1-command-injection-in-adm-cgi)
- [Wavlink NU516U1 OS command injection in adm.cgi](https://junglewise.ai/threats/cve-2026-8190-wavlink-nu516u1-os-command-injection-in-adm-cgi)
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- [Wavlink NU516U1 command injection in change_wifi_password](https://junglewise.ai/threats/cve-2026-8188-wavlink-nu516u1-command-injection-in-change-wifi-password)