Cyber Resilience

CVE-2023-24049

Connectize Ac21000 G6 Firmware 641.139.1.1256

Published
04 December 2023
Modified
29 May 2025
CVSS Score v3.1 9.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0073 51th percentile
Risk Priority 72 floored blend · peak EPSS

Summary

CVE-2023-24049 is a critical-severity Weak Password Requirements (CWE-521) vulnerability in Connectize Ac21000 G6 Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Default Accounts (T1078.001); ranked in the top 49% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A07:2025 Authentication Failures

EU & UK References

Vulnerability Data

An issue was discovered on Connectize AC21000 G6 641.139.1.1256 allows attackers to gain escalated privileges on the device via poor credential management.

CWE(s)
CWE-521CWE-1393

Related Threats

MITRE ATT&CK Enterprise Techniques

T1078.001 Default Accounts Stealth
Adversaries may obtain and abuse credentials of a default account as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion.
attack.mitre.org →
T1078 Valid Accounts Stealth
Adversaries may obtain and abuse credentials of existing accounts as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion.
attack.mitre.org →
T1110 Brute Force Credential Access
Adversaries may use brute force techniques to gain access to accounts when passwords are unknown or when password hashes are obtained.
attack.mitre.org →
T1110.001 Password Guessing Credential Access
Adversaries with no prior knowledge of legitimate credentials within the system or environment may guess passwords to attempt access to accounts.
attack.mitre.org →
T1110.002 Password Cracking Credential Access
Adversaries may use password cracking to attempt to recover usable credentials, such as plaintext passwords, when credential material such as password hashes are obtained.
attack.mitre.org →
T1110.003 Password Spraying Credential Access
Adversaries may use a single or small list of commonly used passwords against many different accounts to attempt to acquire valid account credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-24047Same product: Connectize Ac21000 G6
CVE-2023-24051Same product: Connectize Ac21000 G6
CVE-2023-24052Same product: Connectize Ac21000 G6
CVE-2023-24046Same product: Connectize Ac21000 G6
CVE-2023-24050Same product: Connectize Ac21000 G6
CVE-2023-24048Same product: Connectize Ac21000 G6
CVE-2023-25072Shared CWE-521
CVE-2024-25729Shared CWE-521
CVE-2023-34995Shared CWE-521
CVE-2025-1993Shared CWE-521

Affected Assets

connectize
ac21000 g6 firmware
641.139.1.1256

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)
  • 2 hardening rules · 1 OS baseline
Validate
Prove the fix (OWASP ASVS)
  • V6.2.4
  • V6.2.9
  • V6.2.12
  • V6.4.1

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

IA-5 Authenticator Management
addresses: CWE-521 CWE-1393

Ensuring authenticators have sufficient strength of mechanism for intended use addresses weak password requirements.

CM-6 Configuration Settings
addresses: CWE-521

Configuration settings can define and enforce strong password requirements to avoid weak policies.

IA-1 Policy and Procedures
addresses: CWE-521

IA policy establishes password requirements, directly addressing weak password requirements.

IA-7 Cryptographic Module Authentication
addresses: CWE-1393

Requires authentication that meets guidelines, avoiding default passwords for cryptographic module access.

PL-9 Central Management
addresses: CWE-521

Organization-wide password and authentication policies are applied uniformly, preventing weak local password requirements.

PM-15 Security and Privacy Groups and Associations
addresses: CWE-521

Facilitated training and awareness of current practices improves definition and enforcement of sufficiently strong password requirements.

PM-16 Threat Awareness Program
addresses: CWE-1393

Threat awareness programs disseminate botnet and scanning activity tied to default passwords, driving organizations to change or enforce non-default credentials before mass exploitation occurs.

PM-3 Information Security and Privacy Resources
addresses: CWE-521

Dedicated security resources support deployment of strong authentication systems and enforcement of robust password policies.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.AA-01 full match
prevents

Credential management directly requires replacing default passwords with unique, strong credentials.

PR.AA-03 full match
prevents

Explicitly requires enforcing minimum password strength as part of authentication.

PR.PS-01 mostly match
prevents

Hardened configuration baselines explicitly prohibit default passwords, covering most of the weakness but not all identity-management aspects.

ID.RA-01 partial match
prevents

Vulnerability scanning will discover default-password instances, enabling remediation, yet does not itself prevent their initial use.

PR.AA-05 partial match
prevents

Authorization policies assume credentials already exist and are not default; least-privilege helps limit impact but does not prevent defaults.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.5.17 Authentication information mostly match
prevents

Enforcing minimum length, complexity, non-dictionary, and non-reuse rules directly counters weak password policies that allow attackers to guess or brute-force credentials.

A.8.9 Configuration management mostly match
prevents

Configuration management processes typically enforce changing defaults during hardening.

A.8.5 Secure authentication partial match
mitigates

Requires secure authentication mechanisms, which includes replacing or disabling default credentials.

A.8.18 Use of privileged utility programs none match
none

Utility programs often ship with defaults; control requires secure configuration before use.

A.8.2 Privileged access rights none match
none

Privileged accounts must not retain factory passwords, reducing risk of default-credential abuse.

Hardening callouts derived

Configuration rules from DISA STIG baselines that bear on weaknesses of the type cited by this CVE. Each rule is shown with the relationship its mapping actually records, against the CWE it was authored against. Derived via CVE→CWE over `controls_xwalks` (authoritative rows only; rows rated `none` are excluded).

RHEL 7 (2 rules)
  • V-204424 The Red Hat Enterprise Linux operating system must not allow accounts configured with blank or null passwords. prevents CWE-521
  • V-204425 The Red Hat Enterprise Linux operating system must be configured so that the SSH daemon does not allow authentication using an empty password. prevents CWE-521

References