CVE-2022-2487Known exploitationPublic exploitNetwork attack vector

Arbitrary command execution via start_hour injection

Published Jul 20, 2022 · Updated Apr 15, 2025

OS command injection in Wavlink HALO Base WN535K2 and WN535K3 allows remote attackers to execute arbitrary commands via start_hour. The /cgi-bin/nightled.cgi handler passes the start_hour form value to an operating-system command without neutralizing shell separators; the public proof of concept submits ;ls;. NVD assesses that no login or user interaction is required, and injected commands run with the web service's privileges.

CVSS severity9.8
Critical
EPSS probability79.51%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Wavlink HALO Base WN535K2 and WN535K3 allows remote attackers to execute arbitrary commands via start_hour. The /cgi-bin/nightled.cgi handler passes the start_hour form value to an operating-system command without neutralizing shell separators; the public proof of concept submits ;ls;. NVD assesses that no login or user interaction is required, and injected commands run with the web service's privileges.

The record

CVE
CVE-2022-2487
Published
Jul 20, 2022
Updated
Apr 15, 2025
Vendor
Wavlink
Product
HALO Base WN535K2
Classifications
CWE-78, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 20, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2025Record 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=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wavlink · HALO Base WN535K2version=n/a
Wavlink · HALO Base WN535K3version=n/a

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.0VulDBCVSS:3.1/AV:A/AC:L/PR:L/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
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

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

Reported exploitation

Technologies

Your stack

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Your stack

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