CVE-2022-47618Network attack vector

Unauthenticated administrator access via hard-coded credentials

Published Jan 3, 2023 · Updated Apr 10, 2025

Hard-coded credentials in Merit LILIN AH55B04 and AH55B08 firmware through SVN#7570 allow remote attackers to gain administrator access. The firmware embeds fixed administrator credentials that the management login accepts instead of credentials unique to each device. Any network-reachable device can therefore be administered without prior authentication, enabling arbitrary system changes or a service interruption.

CVSS severity9.8
Critical
EPSS probability1.02%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded credentials in Merit LILIN AH55B04 and AH55B08 firmware through SVN#7570 allow remote attackers to gain administrator access. The firmware embeds fixed administrator credentials that the management login accepts instead of credentials unique to each device. Any network-reachable device can therefore be administered without prior authentication, enabling arbitrary system changes or a service interruption.

The record

CVE
CVE-2022-47618
Published
Jan 3, 2023
Updated
Apr 10, 2025
Vendor
Merit LILIN Ent. Co., Ltd.
Product
AH55B04 DVR Firmware
Classifications
CWE-798, T1078.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 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=unspecified <=SVN#7570

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Merit LILIN Ent. Co., Ltd. · AH55B04 DVR Firmwareversion=unspecified <=SVN#7570
Merit LILIN Ent. Co., Ltd. · AH55B08 DVR Firmwareversion=unspecified <=SVN#7570

Published CVSS scores

9.8TWCERT/CCCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
T1078.001Default Accounts

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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