CVE-2023-37794Public exploitNetwork attack vector

Unauthenticated command execution via upgrade path parameter

Published Jul 14, 2023 · Updated Oct 31, 2024

Command injection in WAYOS FBM-291W 19.09.11V allows remote attackers to execute operating-system commands through an HTTP request. The /upgrade_filter.asp handler interprets shell metacharacters in the POST path parameter as operating-system commands. NVD rates the attack as requiring no privileges or user interaction; successful exploitation can reboot the router or run another supplied command.

CVSS severity9.8
Critical
EPSS probability2.40%
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 WAYOS FBM-291W 19.09.11V allows remote attackers to execute operating-system commands through an HTTP request. The /upgrade_filter.asp handler interprets shell metacharacters in the POST path parameter as operating-system commands. NVD rates the attack as requiring no privileges or user interaction; successful exploitation can reboot the router or run another supplied command.

The record

CVE
CVE-2023-37794
Published
Jul 14, 2023
Updated
Oct 31, 2024
Vendor
Shenzhen WayOS Technology Co., Ltd.
Product
FBM-291W
Classifications
CWE-77, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 31, 2024Record 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=19.09.11V

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shenzhen WayOS Technology Co., Ltd. · FBM-291Wversion=19.09.11V

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

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Technologies

Your stack

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Your stack

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