CVE-2023-3703Network attack vector

Unauthenticated access via default credentials

Published Sep 3, 2023 · Updated Sep 30, 2024

Use of default credentials in Proscend ADVICE ICR Series router firmware 1.76 allows remote attackers to access the device. The public CVE record does not identify the preset account, credential value, or management service that accepts it. Exploitation requires network reachability to that service and unchanged factory credentials, granting the privileges assigned to the default account.

CVSS severity9.8
Critical
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of default credentials in Proscend ADVICE ICR Series router firmware 1.76 allows remote attackers to access the device. The public CVE record does not identify the preset account, credential value, or management service that accepts it. Exploitation requires network reachability to that service and unchanged factory credentials, granting the privileges assigned to the default account.

The record

CVE
CVE-2023-3703
Published
Sep 3, 2023
Updated
Sep 30, 2024
Vendor
Proscend Communications Inc.
Product
ICR Series Routers Firmware
Classifications
CWE-1392, T1078.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 30, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=version 1.76 <Upgrade to fw version 2.24.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Proscend Communications Inc. · ICR Series Routers Firmwareversion=version 1.76 <Upgrade to fw version 2.24.
Proscend Communications Inc. · ADVICE ICR Series Routers Firmwareversion=1.76 <2.24

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0Israel National Cyber DirectorateCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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 exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1392Use of Default Credentials
T1078.001Valid Accounts: Default Accounts

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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