CVE-2026-2548Public exploitNetwork attack vector

Authenticated command execution via unsanitized UPnP settings

Published Feb 16, 2026 · Updated Feb 16, 2026

Command injection in Shenzhen WayOS Technology FBM-220G 24.10.19 allows remote authenticated users to execute commands through UPnP settings. The rc binary's sub_40F820 function reads upnp_waniface, upnp_ssdp_interval, and upnp_max_age from NVRAM, inserts them into an upnp.sh shell command without sanitization, and runs it through jhl_system. UPnP must be enabled, and the attacker must be able to alter stored configuration; injected commands execute when the service starts, including after reboot.

CVSS severity6.3
Medium
EPSS probability2.00%
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 Shenzhen WayOS Technology FBM-220G 24.10.19 allows remote authenticated users to execute commands through UPnP settings. The rc binary's sub_40F820 function reads upnp_waniface, upnp_ssdp_interval, and upnp_max_age from NVRAM, inserts them into an upnp.sh shell command without sanitization, and runs it through jhl_system. UPnP must be enabled, and the attacker must be able to alter stored configuration; injected commands execute when the service starts, including after reboot.

The record

CVE
CVE-2026-2548
Published
Feb 16, 2026
Updated
Feb 16, 2026
Vendor
Shenzhen WayOS Technology Co., Ltd.
Product
FBM-220G
Classifications
CWE-77, CWE-74, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 16, 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=24.10.19

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen WayOS Technology Co., Ltd. · FBM-220Gversion=24.10.19

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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