CVE-2022-40981

Device compromise via unsigned firmware package upload

Published Nov 10, 2022 · Updated Sep 16, 2024

Malicious file upload in ETIC Telecom Remote Access Server 4.5.0 and earlier allows remote authenticated users to compromise the router. The administration web interface accepts uploaded firmware packages without code-signature verification, allowing malicious files to overwrite existing data or consume storage. Exploitation requires an administrator session and LAN-side or VPN reachability; successful uploads can compromise the appliance and privileged connected computers.

CVSS severity5.9
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Malicious file upload in ETIC Telecom Remote Access Server 4.5.0 and earlier allows remote authenticated users to compromise the router. The administration web interface accepts uploaded firmware packages without code-signature verification, allowing malicious files to overwrite existing data or consume storage. Exploitation requires an administrator session and LAN-side or VPN reachability; successful uploads can compromise the appliance and privileged connected computers.

The record

CVE
CVE-2022-40981
Published
Nov 10, 2022
Updated
Sep 16, 2024
Vendor
ETIC Telecom
Product
Machine Access Box (RAS)
Classifications
CWE-434, T1495
Attack vector
adjacent
Privileges
admin

Timeline

How it unfolded

  1. Nov 10, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=0 <=4.5.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesadmin

What is affected?

ETIC Telecom · Machine Access Box (RAS)version=0 <=4.5.0

Published CVSS scores

5.9ETIC TelecomCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L

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)
Vectoradjacent
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1495Firmware Corruption

Public exploit references

No public exploit references are available in this record.

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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