Common Weakness Enumeration

CWE-521

Allowed

Weak Password Requirements

Abstraction: Base · Status: Draft

The product does not require that users should have strong passwords.

351 vulnerabilities reference this CWE, most recent first.

GHSA-9GXX-32P7-FF7M

Vulnerability from github – Published: 2023-04-18 18:30 – Updated: 2024-09-30 20:47
VLAI
Summary
Modoboa has Weak Password Requirements
Details

Modoboa 2.0.5 and prior allows users to set unsafe passwords, such as 1 or HACK. This issue is fixed in commit 130257c96a2392ada795785a91178e656e27015c and is part of version 2.1.0.

Show details on source website

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.0.5"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "modoboa"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.1.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-2160"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-521"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-04-21T20:25:27Z",
    "nvd_published_at": "2023-04-18T16:15:09Z",
    "severity": "MODERATE"
  },
  "details": "Modoboa 2.0.5 and prior allows users to set unsafe passwords, such as `1` or `HACK`. This issue is fixed in commit 130257c96a2392ada795785a91178e656e27015c and is part of version 2.1.0.",
  "id": "GHSA-9gxx-32p7-ff7m",
  "modified": "2024-09-30T20:47:28Z",
  "published": "2023-04-18T18:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-2160"
    },
    {
      "type": "WEB",
      "url": "https://github.com/modoboa/modoboa/commit/130257c96a2392ada795785a91178e656e27015c"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/modoboa/modoboa"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/modoboa/PYSEC-2023-34.yaml"
    },
    {
      "type": "WEB",
      "url": "https://huntr.dev/bounties/54fb6d6a-6b39-45b6-b62a-930260ba484b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Modoboa has Weak Password Requirements"
}

GHSA-9HH3-Q329-2QC2

Vulnerability from github – Published: 2022-05-24 22:00 – Updated: 2022-12-07 21:30
VLAI
Details

IBM Security Key Lifecycle Manager 3.0 and 3.0.1 does not require that users should have strong passwords by default, which makes it easier for attackers to compromise user accounts. IBM X-Force ID: 166626.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2019-4565"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-521"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-09-20T16:15:00Z",
    "severity": "MODERATE"
  },
  "details": "IBM Security Key Lifecycle Manager 3.0 and 3.0.1 does not require that users should have strong passwords by default, which makes it easier for attackers to compromise user accounts. IBM X-Force ID: 166626.",
  "id": "GHSA-9hh3-q329-2qc2",
  "modified": "2022-12-07T21:30:28Z",
  "published": "2022-05-24T22:00:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-4565"
    },
    {
      "type": "WEB",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/166626"
    },
    {
      "type": "WEB",
      "url": "https://www.ibm.com/support/pages/security-bulletin-ibm-security-key-lifecycle-manager-uses-weak-password-policy-cve-2019-4565"
    }
  ],
  "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-9Q9P-JXQV-H77M

Vulnerability from github – Published: 2023-03-21 18:30 – Updated: 2023-03-27 18:30
VLAI
Details

An issue discovered in MEGAFEIS, BOFEI DBD+ Application for IOS & Android v1.4.4 allows attacker to gain access to sensitive account information via insecure password policy.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2022-45635"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-521"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-03-21T16:15:00Z",
    "severity": "HIGH"
  },
  "details": "An issue discovered in MEGAFEIS, BOFEI DBD+ Application for IOS \u0026 Android v1.4.4 allows attacker to gain access to sensitive account information via insecure password policy.",
  "id": "GHSA-9q9p-jxqv-h77m",
  "modified": "2023-03-27T18:30:25Z",
  "published": "2023-03-21T18:30:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-45635"
    },
    {
      "type": "WEB",
      "url": "https://github.com/WithSecureLabs/megafeis-palm/tree/main/CVE-2022-45635"
    }
  ],
  "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-9V4M-78RP-FGV2

Vulnerability from github – Published: 2022-05-24 19:17 – Updated: 2022-05-24 19:17
VLAI
Details

The TIBCO EBX Web Server component of TIBCO Software Inc.'s TIBCO EBX, TIBCO EBX, TIBCO EBX, and TIBCO Product and Service Catalog powered by TIBCO EBX contains a vulnerability that under certain specific conditions allows an attacker to enter a password other than the legitimate password and it will be accepted as valid. Affected releases are TIBCO Software Inc.'s TIBCO EBX: versions 5.8.123 and below, TIBCO EBX: versions 5.9.3, 5.9.4, 5.9.5, 5.9.6, 5.9.7, 5.9.8, 5.9.9, 5.9.10, 5.9.11, 5.9.12, 5.9.13, and 5.9.14, TIBCO EBX: versions 6.0.0 and 6.0.1, and TIBCO Product and Service Catalog powered by TIBCO EBX: version 1.0.0.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2021-35498"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-521"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-10-13T17:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "The TIBCO EBX Web Server component of TIBCO Software Inc.\u0027s TIBCO EBX, TIBCO EBX, TIBCO EBX, and TIBCO Product and Service Catalog powered by TIBCO EBX contains a vulnerability that under certain specific conditions allows an attacker to enter a password other than the legitimate password and it will be accepted as valid. Affected releases are TIBCO Software Inc.\u0027s TIBCO EBX: versions 5.8.123 and below, TIBCO EBX: versions 5.9.3, 5.9.4, 5.9.5, 5.9.6, 5.9.7, 5.9.8, 5.9.9, 5.9.10, 5.9.11, 5.9.12, 5.9.13, and 5.9.14, TIBCO EBX: versions 6.0.0 and 6.0.1, and TIBCO Product and Service Catalog powered by TIBCO EBX: version 1.0.0.",
  "id": "GHSA-9v4m-78rp-fgv2",
  "modified": "2022-05-24T19:17:23Z",
  "published": "2022-05-24T19:17:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-35498"
    },
    {
      "type": "WEB",
      "url": "https://www.tibco.com/services/support/advisories"
    },
    {
      "type": "WEB",
      "url": "https://www.tibco.com/support/advisories/2021/10/tibco-security-advisory-october-13-2021-tibco-ebx-2021-35498"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-9V8J-2F6R-7842

Vulnerability from github – Published: 2022-12-15 21:30 – Updated: 2022-12-20 03:30
VLAI
Details

Beijing Zed-3 Technologies Co.,Ltd VoIP simpliclty ASG 8.5.0.17807 (20181130-16:12) has a Weak password vulnerability.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2022-44236"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-521"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-12-15T19:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "Beijing Zed-3 Technologies Co.,Ltd VoIP simpliclty ASG 8.5.0.17807 (20181130-16:12) has a Weak password vulnerability.",
  "id": "GHSA-9v8j-2f6r-7842",
  "modified": "2022-12-20T03:30:28Z",
  "published": "2022-12-15T21:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-44236"
    },
    {
      "type": "WEB",
      "url": "https://github.com/liong007/Zed-3/issues/2"
    }
  ],
  "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-C38H-5GMX-RF6H

Vulnerability from github – Published: 2022-08-23 00:00 – Updated: 2022-08-27 00:00
VLAI
Details

Tabit - password enumeration. Description: Tabit - password enumeration. The passwords for the Tabit system is a 4 digit OTP. One can resend OTP and try logging in indefinitely. Once again, this is an example of OWASP: API4 - Rate limiting.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2022-34772"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-521"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-08-22T15:15:00Z",
    "severity": "HIGH"
  },
  "details": "Tabit - password enumeration. Description: Tabit - password enumeration. The passwords for the Tabit system is a 4 digit OTP. One can resend OTP and try logging in indefinitely. Once again, this is an example of OWASP: API4 - Rate limiting.",
  "id": "GHSA-c38h-5gmx-rf6h",
  "modified": "2022-08-27T00:00:51Z",
  "published": "2022-08-23T00:00:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-34772"
    },
    {
      "type": "WEB",
      "url": "https://www.gov.il/en/departments/faq/cve_advisories"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-C54C-X29C-V3W9

Vulnerability from github – Published: 2022-05-24 22:00 – Updated: 2022-12-02 21:30
VLAI
Details

IBM PureApplication System 2.2.3.0 through 2.2.5.3 does not require that users should have strong passwords by default, which makes it easier for attackers to compromise user accounts. IBM X-Force ID: 159417.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2019-4235"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-521"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-06-26T15:15:00Z",
    "severity": "HIGH"
  },
  "details": "IBM PureApplication System 2.2.3.0 through 2.2.5.3 does not require that users should have strong passwords by default, which makes it easier for attackers to compromise user accounts. IBM X-Force ID: 159417.",
  "id": "GHSA-c54c-x29c-v3w9",
  "modified": "2022-12-02T21:30:44Z",
  "published": "2022-05-24T22:00:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-4235"
    },
    {
      "type": "WEB",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/159417"
    },
    {
      "type": "WEB",
      "url": "https://www-01.ibm.com/support/docview.wss?uid=ibm10885602"
    }
  ],
  "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-C563-X35J-VFW8

Vulnerability from github – Published: 2022-06-02 00:00 – Updated: 2022-06-09 00:00
VLAI
Details

Dell PowerScale OneFS versions 8.2.0.x through 9.3.0.x, contain a weak password requirement vulnerability. An administrator may create an account with no password. A remote attacker may potentially exploit this leading to a user account compromise.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2022-29098"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-521"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-06-01T15:15:00Z",
    "severity": "HIGH"
  },
  "details": "Dell PowerScale OneFS versions 8.2.0.x through 9.3.0.x, contain a weak password requirement vulnerability. An administrator may create an account with no password. A remote attacker may potentially exploit this leading to a user account compromise.",
  "id": "GHSA-c563-x35j-vfw8",
  "modified": "2022-06-09T00:00:16Z",
  "published": "2022-06-02T00:00:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-29098"
    },
    {
      "type": "WEB",
      "url": "https://www.dell.com/support/kbdoc/en-us/000200128/dsa-2022-082-dell-emc-powerscale-onefs-security-update?lang=en"
    }
  ],
  "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-CFHV-8246-QFW8

Vulnerability from github – Published: 2024-03-08 00:33 – Updated: 2024-08-01 15:31
VLAI
Details

Arris SBG6580 devices have predictable default WPA2 security passwords that could lead to unauthorized remote access. (They use the first 6 characters of the SSID and the last 6 characters of the BSSID, decrementing the last octet.)

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2024-25729"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-521"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-03-08T00:15:50Z",
    "severity": "HIGH"
  },
  "details": "Arris SBG6580 devices have predictable default WPA2 security passwords that could lead to unauthorized remote access. (They use the first 6 characters of the SSID and the last 6 characters of the BSSID, decrementing the last octet.)",
  "id": "GHSA-cfhv-8246-qfw8",
  "modified": "2024-08-01T15:31:30Z",
  "published": "2024-03-08T00:33:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-25729"
    },
    {
      "type": "WEB",
      "url": "https://github.com/actuator/cve/blob/main/Arris/CVE-2024-25729"
    },
    {
      "type": "WEB",
      "url": "https://github.com/actuator/cve/blob/main/Arris/SBG6580.png"
    },
    {
      "type": "WEB",
      "url": "https://i.ebayimg.com/images/g/DhoAAOSwx0FbhhcN/s-l1600.jpg"
    },
    {
      "type": "WEB",
      "url": "https://i.ebayimg.com/images/g/z2oAAOSwO1pbQ9BS/s-l1600.jpg"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-CFWP-MMQM-9VRH

Vulnerability from github – Published: 2026-01-19 21:33 – Updated: 2026-01-30 18:31
VLAI
Details

HCL AION  version 2 is affected by a Weak Password Policy vulnerability. This can  allow the use of easily guessable passwords, potentially resulting in unauthorized access

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-55252"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-521"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-19T19:16:02Z",
    "severity": "LOW"
  },
  "details": "HCL AION\u00a0 version 2 is affected by a Weak Password Policy vulnerability. This can \u00a0allow the use of easily guessable passwords, potentially resulting in unauthorized access",
  "id": "GHSA-cfwp-mmqm-9vrh",
  "modified": "2026-01-30T18:31:13Z",
  "published": "2026-01-19T21:33:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-55252"
    },
    {
      "type": "WEB",
      "url": "https://support.hcl-software.com/kb_view.do?sys_kb_id=4b92474633de7ad4159a05273e5c7b4b\u0026searchTerm=kb0127995#"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

Mitigation
Architecture and Design
  • A product's design should require adherance to an appropriate password policy. Specific password requirements depend strongly on contextual factors, but it is recommended to contain the following attributes:
  • Depending on the threat model, the password policy may include several additional attributes.
  • See NIST 800-63B [REF-1053] for further information on password requirements.
  • {'xhtml:li': ['Enforcement of a minimum and maximum length', 'Restrictions against password reuse', 'Restrictions against using common passwords', 'Restrictions against using contextual string in the password (e.g., user id, app name)']}
  • {'xhtml:li': [{'xhtml:ul': {'xhtml:li': ['Increasing the range of characters makes the password harder to crack and may be appropriate for systems relying on single factor authentication.', 'Unfortunately, a complex password may be difficult to memorize, encouraging a user to select a short password or to incorrectly manage the password (write it down).', "Another disadvantage of this approach is that it often does not result in a significant increases in overal password complexity due to people's predictable usage of various symbols."]}, '#text': 'Complex passwords requiring mixed character sets (alpha, numeric, special, mixed case)'}, {'xhtml:ul': {'xhtml:li': ['Increasing the number of characters makes the password harder to crack and may be appropriate for systems relying on single factor authentication.', 'A disadvantage of this approach is that selecting a good passphrase is not easy and poor passwords can still be generated. Some prompting may be needed to encourage long un-predictable passwords.']}, '#text': 'Large Minimum Length (encouraging passphrases instead of passwords)'}, {'xhtml:ul': {'xhtml:li': ['Generating a password for the user can help make sure that length and complexity requirements are met, and can result in secure passwords being used.', 'A disadvantage of this approach is that the resulting password or passpharse may be too difficult to memorize, encouraging them to be written down.']}, '#text': 'Randomly Chosen Secrets'}]}
Mitigation
Architecture and Design

Consider a second authentication factor beyond the password, which prevents the password from being a single point of failure. See CWE-308 for further information.

Mitigation
Implementation

Consider implementing a password complexity meter to inform users when a chosen password meets the required attributes.

Mitigation
Implementation

Previously, "password expiration" was widely advocated as a defense-in-depth approach to minimize the risk of weak passwords, and it has become a common practice. Password expiration requires a password to be changed within a fixed time window (such as every 90 days). However, this approach has significant limitations in the current threat landscape, and its utility has been reduced in light of the adoption of related protection mechanisms (such as password complexity and computational effort), along with the recognition that regular password changes often caused users to generate more predictable passwords. As a result, this is now a Discouraged Common Practice [REF-1488] [REF-1489], especially as the sole factor in protecting passwords. It is still strongly encouraged to force password changes in case of evidence of compromise, but this is not the same as a forced "expiration" on an arbitrary time frame.

CAPEC-112: Brute Force

In this attack, some asset (information, functionality, identity, etc.) is protected by a finite secret value. The attacker attempts to gain access to this asset by using trial-and-error to exhaustively explore all the possible secret values in the hope of finding the secret (or a value that is functionally equivalent) that will unlock the asset.

CAPEC-16: Dictionary-based Password Attack

An attacker tries each of the words in a dictionary as passwords to gain access to the system via some user's account. If the password chosen by the user was a word within the dictionary, this attack will be successful (in the absence of other mitigations). This is a specific instance of the password brute forcing attack pattern.

Dictionary Attacks differ from similar attacks such as Password Spraying (CAPEC-565) and Credential Stuffing (CAPEC-600), since they leverage unknown username/password combinations and don't care about inducing account lockouts.

CAPEC-49: Password Brute Forcing

An adversary tries every possible value for a password until they succeed. A brute force attack, if feasible computationally, will always be successful because it will essentially go through all possible passwords given the alphabet used (lower case letters, upper case letters, numbers, symbols, etc.) and the maximum length of the password.

CAPEC-509: Kerberoasting

Through the exploitation of how service accounts leverage Kerberos authentication with Service Principal Names (SPNs), the adversary obtains and subsequently cracks the hashed credentials of a service account target to exploit its privileges. The Kerberos authentication protocol centers around a ticketing system which is used to request/grant access to services and to then access the requested services. As an authenticated user, the adversary may request Active Directory and obtain a service ticket with portions encrypted via RC4 with the private key of the authenticated account. By extracting the local ticket and saving it disk, the adversary can brute force the hashed value to reveal the target account credentials.

CAPEC-55: Rainbow Table Password Cracking

An attacker gets access to the database table where hashes of passwords are stored. They then use a rainbow table of pre-computed hash chains to attempt to look up the original password. Once the original password corresponding to the hash is obtained, the attacker uses the original password to gain access to the system.

CAPEC-555: Remote Services with Stolen Credentials

This pattern of attack involves an adversary that uses stolen credentials to leverage remote services such as RDP, telnet, SSH, and VNC to log into a system. Once access is gained, any number of malicious activities could be performed.

CAPEC-561: Windows Admin Shares with Stolen Credentials

An adversary guesses or obtains (i.e. steals or purchases) legitimate Windows administrator credentials (e.g. userID/password) to access Windows Admin Shares on a local machine or within a Windows domain.

CAPEC-565: Password Spraying

In a Password Spraying attack, an adversary tries a small list (e.g. 3-5) of common or expected passwords, often matching the target's complexity policy, against a known list of user accounts to gain valid credentials. The adversary tries a particular password for each user account, before moving onto the next password in the list. This approach assists the adversary in remaining undetected by avoiding rapid or frequent account lockouts. The adversary may then reattempt the process with additional passwords, once enough time has passed to prevent inducing a lockout.

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.