Common Weakness Enumeration

CWE-798

Allowed-with-Review

Use of Hard-coded Credentials

Abstraction: Base · Status: Draft

The product contains hard-coded credentials, such as a password or cryptographic key.

2185 vulnerabilities reference this CWE, most recent first.

GHSA-2PFW-VJ6X-2W7X

Vulnerability from github – Published: 2022-11-25 00:30 – Updated: 2022-11-28 21:30
VLAI
Details

Use of Hard-coded Cryptographic Key vulnerability in Mitsubishi Electric GX Works3 all versions allows a remote unauthenticated attacker to disclose sensitive information . As a result, unauthorized users may view or execute programs illegally.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2022-29829"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-321",
      "CWE-798"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-11-25T00:15:00Z",
    "severity": "HIGH"
  },
  "details": "Use of Hard-coded Cryptographic Key vulnerability in Mitsubishi Electric GX Works3 all versions allows a remote unauthenticated attacker to disclose sensitive information . As a result, unauthorized users may view or execute programs illegally.",
  "id": "GHSA-2pfw-vj6x-2w7x",
  "modified": "2022-11-28T21:30:22Z",
  "published": "2022-11-25T00:30:59Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-29829"
    },
    {
      "type": "WEB",
      "url": "https://jvn.jp/vu/JVNVU97244961/index.html"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/uscert/ics/advisories/icsa-22-333-05"
    },
    {
      "type": "WEB",
      "url": "https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-015_en.pdf"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-2PW8-G87H-MHMJ

Vulnerability from github – Published: 2022-05-13 01:06 – Updated: 2025-04-20 03:35
VLAI
Details

DragonWave Horizon 1.01.03 wireless radios have hardcoded login credentials (such as the username of energetic and password of wireless) meant to allow the vendor to access the devices. These credentials can be used in the web interface or by connecting to the device via TELNET. This is fixed in recent versions including 1.4.8.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2017-7576"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-798"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-04-06T22:59:00Z",
    "severity": "CRITICAL"
  },
  "details": "DragonWave Horizon 1.01.03 wireless radios have hardcoded login credentials (such as the username of energetic and password of wireless) meant to allow the vendor to access the devices. These credentials can be used in the web interface or by connecting to the device via TELNET. This is fixed in recent versions including 1.4.8.",
  "id": "GHSA-2pw8-g87h-mhmj",
  "modified": "2025-04-20T03:35:31Z",
  "published": "2022-05-13T01:06:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-7576"
    },
    {
      "type": "WEB",
      "url": "http://blog.iancaling.com/post/159276197313"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-2PWC-7GR8-9W97

Vulnerability from github – Published: 2025-04-23 18:30 – Updated: 2025-04-23 18:30
VLAI
Details

CarlinKit CPC200-CCPA Wireless Hotspot Hard-Coded Credentials Authentication Bypass Vulnerability. This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of CarlinKit CPC200-CCPA devices. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the configuration of the wireless hotspot. The issue results from the use of hard-coded credentials. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-24349.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-2765"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-798"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-23T17:16:54Z",
    "severity": "HIGH"
  },
  "details": "CarlinKit CPC200-CCPA Wireless Hotspot Hard-Coded Credentials Authentication Bypass Vulnerability. This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of CarlinKit CPC200-CCPA devices. Authentication is not required to exploit this vulnerability.\n\nThe specific flaw exists within the configuration of the wireless hotspot. The issue results from the use of hard-coded credentials. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-24349.",
  "id": "GHSA-2pwc-7gr8-9w97",
  "modified": "2025-04-23T18:30:59Z",
  "published": "2025-04-23T18:30:59Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-2765"
    },
    {
      "type": "WEB",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-25-177"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-2PXP-HM79-MVQX

Vulnerability from github – Published: 2024-08-01 03:30 – Updated: 2024-08-01 03:30
VLAI
Details

A vulnerability was found in TOTOLINK CP450 4.1.0cu.747_B20191224. It has been classified as critical. This affects an unknown part of the file /web_cste/cgi-bin/product.ini of the component Telnet Service. The manipulation leads to use of hard-coded password. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-273255. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2024-7332"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-259",
      "CWE-798"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-08-01T01:15:09Z",
    "severity": "CRITICAL"
  },
  "details": "A vulnerability was found in TOTOLINK CP450 4.1.0cu.747_B20191224. It has been classified as critical. This affects an unknown part of the file /web_cste/cgi-bin/product.ini of the component Telnet Service. The manipulation leads to use of hard-coded password. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-273255. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.",
  "id": "GHSA-2pxp-hm79-mvqx",
  "modified": "2024-08-01T03:30:46Z",
  "published": "2024-08-01T03:30:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-7332"
    },
    {
      "type": "WEB",
      "url": "https://github.com/abcdefg-png/IoT-vulnerable/blob/main/TOTOLINK/CP450/product.md"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.273255"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.273255"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?submit.378357"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

GHSA-2Q3H-PXC2-8GQG

Vulnerability from github – Published: 2025-01-14 15:30 – Updated: 2025-01-14 15:30
VLAI
Details

A use of hard-coded cryptographic key in Fortinet FortiSwitch version 7.4.0 and 7.2.0 through 7.2.5 and 7.0.0 through 7.0.7 and 6.4.0 through 6.4.13 and 6.2.0 through 6.2.7 and 6.0.0 through 6.0.7 allows attacker to execute unauthorized code or commands via crafted requests.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2023-37936"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-321",
      "CWE-798"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-14T14:15:26Z",
    "severity": "CRITICAL"
  },
  "details": "A use of hard-coded cryptographic key in Fortinet FortiSwitch version 7.4.0 and 7.2.0 through 7.2.5 and 7.0.0 through 7.0.7 and 6.4.0 through 6.4.13 and 6.2.0 through 6.2.7 and 6.0.0 through 6.0.7 allows attacker to execute unauthorized code or commands via crafted requests.",
  "id": "GHSA-2q3h-pxc2-8gqg",
  "modified": "2025-01-14T15:30:52Z",
  "published": "2025-01-14T15:30:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-37936"
    },
    {
      "type": "WEB",
      "url": "https://fortiguard.com/psirt/FG-IR-23-260"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-2QCW-CW26-GCHC

Vulnerability from github – Published: 2025-12-10 09:30 – Updated: 2026-05-28 15:39
VLAI
Details

Hard-coded cryptographic keys in Admin UI of EZCast Pro II version 1.17478.146 allows attackers to bypass authorization checks and gain full access to the admin UI

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-13954"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-798"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-10T09:15:46Z",
    "severity": "CRITICAL"
  },
  "details": "Hard-coded cryptographic keys in Admin UI of EZCast Pro II version 1.17478.146\u00a0allows attackers to bypass authorization checks and gain full access to the admin UI",
  "id": "GHSA-2qcw-cw26-gchc",
  "modified": "2026-05-28T15:39:37Z",
  "published": "2025-12-10T09:30:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-13954"
    },
    {
      "type": "WEB",
      "url": "https://www.ncsc.admin.ch/ncsc/en/home/infos-fuer/infos-it-spezialisten/themen/schwachstelle-melden/cvd-cases/cvd-case-1-test.html"
    },
    {
      "type": "WEB",
      "url": "https://www.nimbletech.com.tw/index.php/release-note"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:L/U:X",
      "type": "CVSS_V4"
    }
  ]
}

GHSA-2QQC-P94C-HXWH

Vulnerability from github – Published: 2026-04-16 21:22 – Updated: 2026-04-16 21:22
VLAI
Summary
Flowise: Weak Default Express Session Secret
Details

Detection Method: Kolega.dev Deep Code Scan

Attribute Value
Location packages/server/src/enterprise/middleware/passport/index.ts:55
Practical Exploitability High
Developer Approver faizan@kolega.ai

Description

Express session secret has a weak default value 'flowise' when EXPRESS_SESSION_SECRET is not set.

Affected Code

secret: process.env.EXPRESS_SESSION_SECRET || 'flowise'

Evidence

The default session secret 'flowise' is publicly visible and weak. Session cookies signed with this secret can be forged by attackers.

Impact

Session hijacking and forgery - attackers can create arbitrary session cookies to impersonate any user, bypassing all authentication mechanisms.

Recommendation

Require EXPRESS_SESSION_SECRET to be set with a strong random value. Throw an error on startup if not configured. Use cryptographically strong random strings (minimum 256 bits).

Notes

The Express session secret defaults to the string 'flowise' when EXPRESS_SESSION_SECRET is not set (line 55). This secret is used to sign session cookies via express-session middleware. Since 'flowise' is publicly visible in the source code, an attacker can forge valid session cookies to impersonate any user without authentication. The .env.example file has this commented out (# EXPRESS_SESSION_SECRET=flowise), implying it's optional, which compounds the risk. Unlike development-only defaults, this code path is active in production if the environment variable is not set. The application should require EXPRESS_SESSION_SECRET to be explicitly configured with a cryptographically strong random value and fail to start otherwise.

Show details on source website

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.0.13"
      },
      "package": {
        "ecosystem": "npm",
        "name": "flowise"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-798"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-16T21:22:00Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "**Detection Method:** Kolega.dev Deep Code Scan\n\n| Attribute | Value |\n|---|---|\n| Location | packages/server/src/enterprise/middleware/passport/index.ts:55 |\n| Practical Exploitability | High |\n| Developer Approver | faizan@kolega.ai |\n\n### Description\nExpress session secret has a weak default value \u0027flowise\u0027 when EXPRESS_SESSION_SECRET is not set.\n\n### Affected Code\n```\nsecret: process.env.EXPRESS_SESSION_SECRET || \u0027flowise\u0027\n```\n\n### Evidence\nThe default session secret \u0027flowise\u0027 is publicly visible and weak. Session cookies signed with this secret can be forged by attackers.\n\n### Impact\nSession hijacking and forgery - attackers can create arbitrary session cookies to impersonate any user, bypassing all authentication mechanisms.\n\n### Recommendation\nRequire EXPRESS_SESSION_SECRET to be set with a strong random value. Throw an error on startup if not configured. Use cryptographically strong random strings (minimum 256 bits).\n\n### Notes\nThe Express session secret defaults to the string \u0027flowise\u0027 when EXPRESS_SESSION_SECRET is not set (line 55). This secret is used to sign session cookies via express-session middleware. Since \u0027flowise\u0027 is publicly visible in the source code, an attacker can forge valid session cookies to impersonate any user without authentication. The .env.example file has this commented out (# EXPRESS_SESSION_SECRET=flowise), implying it\u0027s optional, which compounds the risk. Unlike development-only defaults, this code path is active in production if the environment variable is not set. The application should require EXPRESS_SESSION_SECRET to be explicitly configured with a cryptographically strong random value and fail to start otherwise.",
  "id": "GHSA-2qqc-p94c-hxwh",
  "modified": "2026-04-16T21:22:00Z",
  "published": "2026-04-16T21:22:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-2qqc-p94c-hxwh"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/FlowiseAI/Flowise"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Flowise: Weak Default Express Session Secret"
}

GHSA-2QQR-7RG8-6QMH

Vulnerability from github – Published: 2022-05-24 19:07 – Updated: 2022-05-24 19:07
VLAI
Details

An issue was discovered in CommScope Ruckus IoT Controller 1.7.1.0 and earlier. Hard-coded API Keys exist.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2021-33220"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-798"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-07-07T15:15:00Z",
    "severity": "HIGH"
  },
  "details": "An issue was discovered in CommScope Ruckus IoT Controller 1.7.1.0 and earlier. Hard-coded API Keys exist.",
  "id": "GHSA-2qqr-7rg8-6qmh",
  "modified": "2022-05-24T19:07:00Z",
  "published": "2022-05-24T19:07:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33220"
    },
    {
      "type": "WEB",
      "url": "https://korelogic.com/advisories.html"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2021/May/73"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-2R4P-GW5X-3P8W

Vulnerability from github – Published: 2022-05-13 01:11 – Updated: 2022-05-13 01:11
VLAI
Details

General Electric (GE) Multilink ML800, ML1200, ML1600, and ML2400 switches with firmware before 5.5.0 and ML810, ML3000, and ML3100 switches with firmware before 5.5.0k have hardcoded credentials, which allows remote attackers to modify configuration settings via the web interface.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2016-2310"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-798"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2016-06-09T10:59:00Z",
    "severity": "CRITICAL"
  },
  "details": "General Electric (GE) Multilink ML800, ML1200, ML1600, and ML2400 switches with firmware before 5.5.0 and ML810, ML3000, and ML3100 switches with firmware before 5.5.0k have hardcoded credentials, which allows remote attackers to modify configuration settings via the web interface.",
  "id": "GHSA-2r4p-gw5x-3p8w",
  "modified": "2022-05-13T01:11:18Z",
  "published": "2022-05-13T01:11:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-2310"
    },
    {
      "type": "WEB",
      "url": "https://ics-cert.us-cert.gov/advisories/ICSA-16-154-01"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-2R5H-7MQ7-4Q8V

Vulnerability from github – Published: 2022-05-13 01:43 – Updated: 2022-05-13 01:43
VLAI
Details

In net.MCrypt in the "Diary with lock" (aka WriteDiary) application 4.72 for Android, hardcoded SecretKey and iv variables are used for the AES parameters, which makes it easier for attackers to obtain the cleartext of stored diary entries.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2017-15582"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-798"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-10-27T20:29:00Z",
    "severity": "HIGH"
  },
  "details": "In net.MCrypt in the \"Diary with lock\" (aka WriteDiary) application 4.72 for Android, hardcoded SecretKey and iv variables are used for the AES parameters, which makes it easier for attackers to obtain the cleartext of stored diary entries.",
  "id": "GHSA-2r5h-7mq7-4q8v",
  "modified": "2022-05-13T01:43:47Z",
  "published": "2022-05-13T01:43:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-15582"
    },
    {
      "type": "WEB",
      "url": "https://1337sec.blogspot.de/2017/10/auditing-writediarycom-cve-2017-15581.html"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/anonymous/603b89f864a71426042b167cab557efa"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

Mitigation
Architecture and Design
  • For outbound authentication: store passwords, keys, and other credentials outside of the code in a strongly-protected, encrypted configuration file or database that is protected from access by all outsiders, including other local users on the same system. Properly protect the key (CWE-320). If you cannot use encryption to protect the file, then make sure that the permissions are as restrictive as possible [REF-7].
  • In Windows environments, the Encrypted File System (EFS) may provide some protection.
Mitigation
Architecture and Design

For inbound authentication: Rather than hard-code a default username and password, key, or other authentication credentials for first time logins, utilize a "first login" mode that requires the user to enter a unique strong password or key.

Mitigation
Architecture and Design

If the product must contain hard-coded credentials or they cannot be removed, perform access control checks and limit which entities can access the feature that requires the hard-coded credentials. For example, a feature might only be enabled through the system console instead of through a network connection.

Mitigation
Architecture and Design
  • For inbound authentication using passwords: apply strong one-way hashes to passwords and store those hashes in a configuration file or database with appropriate access control. That way, theft of the file/database still requires the attacker to try to crack the password. When handling an incoming password during authentication, take the hash of the password and compare it to the saved hash.
  • Use randomly assigned salts for each separate hash that is generated. This increases the amount of computation that an attacker needs to conduct a brute-force attack, possibly limiting the effectiveness of the rainbow table method.
Mitigation
Architecture and Design
  • For front-end to back-end connections: Three solutions are possible, although none are complete.
  • The first suggestion involves the use of generated passwords or keys that are changed automatically and must be entered at given time intervals by a system administrator. These passwords will be held in memory and only be valid for the time intervals.
  • Next, the passwords or keys should be limited at the back end to only performing actions valid for the front end, as opposed to having full access.
  • Finally, the messages sent should be tagged and checksummed with time sensitive values so as to prevent replay-style attacks.
CAPEC-191: Read Sensitive Constants Within an Executable

An adversary engages in activities to discover any sensitive constants present within the compiled code of an executable. These constants may include literal ASCII strings within the file itself, or possibly strings hard-coded into particular routines that can be revealed by code refactoring methods including static and dynamic analysis.

CAPEC-70: Try Common or Default Usernames and Passwords

An adversary may try certain common or default usernames and passwords to gain access into the system and perform unauthorized actions. An adversary may try an intelligent brute force using empty passwords, known vendor default credentials, as well as a dictionary of common usernames and passwords. Many vendor products come preconfigured with default (and thus well-known) usernames and passwords that should be deleted prior to usage in a production environment. It is a common mistake to forget to remove these default login credentials. Another problem is that users would pick very simple (common) passwords (e.g. "secret" or "password") that make it easier for the attacker to gain access to the system compared to using a brute force attack or even a dictionary attack using a full dictionary.