CVE-2026-2615Public exploitNetwork attack vector

Root command execution via omitted semicolon filter

Published Feb 17, 2026 · Updated Feb 17, 2026

Command injection in Wavlink WL-NU516U1 20251208 allows remote authenticated users to execute shell commands through firewall.cgi. The singlePortForwardDelete handler places del_flag in a uci command after a blacklist check that omits the semicolon, then passes the command to system(). A valid session cookie is required, and successful exploitation executes attacker-supplied commands as root on the appliance.

CVSS severity7.2
High
EPSS probability12.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Wavlink WL-NU516U1 20251208 allows remote authenticated users to execute shell commands through firewall.cgi. The singlePortForwardDelete handler places del_flag in a uci command after a blacklist check that omits the semicolon, then passes the command to system(). A valid session cookie is required, and successful exploitation executes attacker-supplied commands as root on the appliance.

The record

CVE
CVE-2026-2615
Published
Feb 17, 2026
Updated
Feb 17, 2026
Vendor
Wavlink
Product
WL-NU516U1
Classifications
CWE-74, CWE-77, T1059.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=20251208

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Wavlink · WL-NU516U1version=20251208

Published CVSS scores

8.3VulDBAV:N/AC:L/Au:M/C:C/I:C/A:C
7.3VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
7.2VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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