CVE-2026-4544Public exploitNetwork attack vector

Authenticated script injection via unfiltered login parameters

Published Mar 22, 2026 · Updated Mar 22, 2026

Cross-site scripting in Wavlink WL-WN578W2 firmware 221110 allows remote authenticated users to inject script through login requests. When page=login, login.cgi copies homepage or hostname from the POST body with sprintf, then its response builder returns that value without output encoding. Administrator-level credentials and victim interaction are required; successful exploitation runs attacker-supplied script in the victim's browser.

CVSS severity2.4
Low
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Wavlink WL-WN578W2 firmware 221110 allows remote authenticated users to inject script through login requests. When page=login, login.cgi copies homepage or hostname from the POST body with sprintf, then its response builder returns that value without output encoding. Administrator-level credentials and victim interaction are required; successful exploitation runs attacker-supplied script in the victim's browser.

The record

CVE
CVE-2026-4544
Published
Mar 22, 2026
Updated
Mar 22, 2026
Vendor
Wavlink
Product
WL-WN578W2 Firmware
Classifications
CWE-94, CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 22, 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=221110

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Wavlink · WL-WN578W2 Firmwareversion=221110

Published CVSS scores

3.3VulDBAV:N/AC:L/Au:M/C:N/I:P/A:N
1.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
2.4VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

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-94Improper Control of Generation of Code ('Code Injection')
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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