CVE-2026-2526
Published: 16 February 2026
Summary
CVE-2026-2526 is a medium-severity Injection (CWE-74) vulnerability in Wavlink Wl-Wn579A3 Firmware. Its CVSS base score is 5.3 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 7.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2026-2526 is a command injection vulnerability affecting Wavlink WL-WN579A3 routers running firmware up to version 20210219. The issue resides in the multi_ssid function within the /cgi-bin/wireless.cgi script, where manipulation of the SSID2G2 argument enables attackers to inject and execute arbitrary commands. Associated with CWE-74 (Improper Neutralization of Special Elements used in an SQL Command) and CWE-77 (Command Injection), it carries a CVSS v3.1 base score of 6.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L), classifying it as medium severity. The vulnerability was publicly disclosed on 2026-02-16.
Exploitation requires low privileges (PR:L), such as those held by an authenticated user, and can be performed remotely over the network with low complexity and no user interaction. Successful attacks allow limited impacts on confidentiality, integrity, and availability, potentially enabling command execution on the device to alter configurations, extract sensitive data, or disrupt services.
Advisories from VulDB and a public exploit proof-of-concept on GitHub detail the manipulation vector but report no vendor response despite early disclosure contact. No patches or official mitigations are available, leaving affected devices exposed; security practitioners should isolate or decommission unpatched Wavlink WL-WN579A3 routers and monitor for exploit attempts.
The exploit has been made public and could be used in targeted attacks against exposed IoT devices.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-6135
Vulnerability details
A vulnerability was found in Wavlink WL-WN579A3 up to 20210219. This impacts the function multi_ssid of the file /cgi-bin/wireless.cgi. Performing a manipulation of the argument SSID2G2 results in command injection. The attack may be initiated remotely. The exploit has been…
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made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Command injection via public-facing web CGI script on router (T1190); enables arbitrary command execution on network device CLI (T1059.008).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
SI-10 enforces information input validation at entry points like the SSID2G2 parameter in the wireless.cgi script, directly preventing command injection attacks.
SI-2 requires timely identification, reporting, and correction of flaws such as this unpatched command injection vulnerability in router firmware.
SI-4 enables monitoring of the system for indicators of unauthorized command execution resulting from exploitation of the vulnerable CGI function.