VulnerabilityPublished 4 Dec 2023Updated 29 May 2025

CVE-2023-24049: Use of Default Password

Source CVE Database V5

Not known to be exploited · CVSS 9.8 Critical.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score

9.8Critical

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.9% chance of exploitation in 30 days – higher than 59% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 4 Dec 2023
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

AI-suggested

Immediate network segmentation: Isolate affected Connectize AC21000 G6 devices from critical network segments to limit potential lateral movement.
Implement strict access controls: Restrict management interface access to trusted IP addresses and use VPNs or secure tunnels for remote management.
Monitor network traffic: Deploy IDS/IPS solutions to detect anomalous activities targeting the router, including unusual login attempts or privilege escalation patterns.
Disable unnecessary services: Turn off any non-essential services or protocols on the router to reduce the attack surface.
Regularly audit device configurations and credentials: Ensure strong, unique passwords are used and rotate credentials frequently.
Engage with vendor support channels: Seek official patches or firmware updates as they become available and apply them promptly.
Employ network-level protections: Use firewalls to block unauthorized access to router management ports and consider deploying endpoint detection on devices connected downstream.
Prepare incident response plans: Develop and test procedures for rapid containment and remediation in case of exploitation. These steps go beyond generic advice by focusing on network architecture adjustments, proactive monitoring, and strict access policies tailored to the specific device and vulnerability context.

Description

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.

Impact

For European organizations, the impact of this vulnerability is significant, especially for those relying on Connectize AC21000 G6 routers or similar devices in their network infrastructure. Compromise of such a device could lead to full network compromise, data breaches, and disruption of critical services. Given the router’s role in managing network traffic, attackers could intercept sensitive communications, inject malicious payloads, or disrupt connectivity. This is particularly concerning for sectors with stringent data protection requirements such as finance, healthcare, and government institutions within Europe. The vulnerability’s ease of exploitation without authentication or user interaction increases the risk of automated attacks or worm-like propagation within vulnerable networks. Additionally, the lack of patches means organizations must act quickly to mitigate exposure. The potential for espionage, data theft, or sabotage aligns with current geopolitical tensions in Europe, increasing the attractiveness of this vulnerability to threat actors targeting European infrastructure.

CWE-1393Use of Default Password (opens in a new tab)
Base weaknessOWASP Top 10 A07:2025: Authentication Failures (opens in a new tab)
The product uses default passwords for potentially critical functionality.
Requirements
Prohibit use of default, hard-coded, or other values that do not vary for each installation of the product - especially for separate organizations.
Documentation
Ensure that product documentation clearly emphasizes the presence of default passwords and provides steps for the administrator to change them.
Architecture and Design
Force the administrator to change the credential upon installation.
OWASP Cheat Sheets
OWASP Authentication (opens in a new tab)
OWASP ASVS 4.0.3
V2.8.5 (opens in a new tab)
V2.8.4 (opens in a new tab)
V9.2.3 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

research.nccgroup.com/2023/10/19/technical-advisory-multiple-vulnerabilities-in-connectize-g6-ac2100-dual-band-gigabit-wifi-router-cve-2023-24046-cve-2023-24047-cve-2023-24048-cve-2023-24049-cve-2023-24050-cve-2023-24051-cve/ (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 8 Jul 2025, 02:14 UTC

WeaknessesCWE-1393

Technical details

References

Community reviews

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