Cyber Resilience

CVE-2024-28066

Exposed Creds in Mitel 6940W Firmware 1.10.4.3 – 1.11.3.0

Public PoCExposed Creds
Published
08 April 2024
Modified
17 June 2026
CVSS Score v3.1 8.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0045 37th percentile
Risk Priority 64 floored blend · peak EPSS

Summary

CVE-2024-28066 is a high-severity Use of Hard-coded Password (CWE-259) vulnerability in Mitel 6940W Firmware. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Default Accounts (T1078.001); ranked at the 37th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to IA-5 (Authenticator Management) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A07:2025 Authentication Failures

EU & UK References

Vulnerability Data

In Unify CP IP Phone firmware 1.10.4.3, Weak Credentials are used (a hardcoded root password).

CWE(s)
CWE-259CWE-1391

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 →
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 →
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 →
T1110.002 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 →
T1552 Unsecured Credentials Credential Access
Adversaries may search compromised systems to find and obtain insecurely stored credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-31459Same vendor: Mitel
CVE-2022-26143Same vendor: Mitel
CVE-2024-47912Same vendor: Mitel
CVE-2024-28069Same vendor: Mitel
CVE-2023-25597Same vendor: Mitel
CVE-2025-67822Same vendor: Mitel
CVE-2024-55550Same vendor: Mitel
CVE-2023-39285Same vendor: Mitel
CVE-2023-40266Same vendor: Mitel
CVE-2024-47223Same vendor: Mitel

Affected Assets

mitel
6940w firmware
1.10.4.3 — 1.11.3.0
mitel
6930w firmware
1.10.4.3 — 1.11.3.0
mitel
6920w firmware
1.10.4.3 — 1.11.3.0
mitel
6970 firmware
1.10.4.3 — 1.11.3.0
mitel
6915 firmware
1.10.4.3 — 1.11.3.0
mitel
6910 firmware
1.10.4.3 — 1.11.3.0
mitel
6905 firmware
1.10.4.3 — 1.11.3.0
mitel
openscape cp710 firmware
1.10.4.3 — 1.11.3.0
mitel
openscape cp410 firmware
1.10.4.3 — 1.11.3.0
mitel
openscape cp210 firmware
1.10.4.3 — 1.11.3.0
+4 more product configuration(s) — see NVD for full list

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)
  • 7 hardening rules · 3 OS baselines
Validate
Prove the fix (OWASP ASVS)
  • V6.2.2
  • V6.3.1
  • V6.3.2
  • V6.4.2

Mitigating Controls (NIST 800-53 r5) AI

IA-5 Authenticator Management good match

IA-5 directly requires management of authenticator strength, distribution, and replacement, stopping default or guessable credentials from being introduced or used.

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 mostly match
prevents

PR.AA-01's credential issuance and key-management processes directly block most weak/default credential usage, yet leave hard-coded or product-design instances of CWE-1391 only partially addressed.

PR.AA-03 mostly match
prevents

Password-strength policies in PR.AA-03 directly block weak authenticators, but the control leaves hard-coded/default credentials largely unaddressed.

PR.PS-01 mostly match
prevents

Hardened baselines and default-setting reviews directly block default/hard-coded creds (mostly), yet leave algorithmic guessing, reuse, and non-config sources of weak credentials untouched (partial).

PR.PS-06 mostly match
prevents

Secure SDLC practices directly prohibit embedding credentials in source code or binaries.

PR.AT-01 partial match
prevents

Training raises password-hygiene awareness and can therefore reduce some weak-credential mistakes, yet supplies no enforcement mechanism and leaves the dominant technical sources of CWE-1391 untouched.

PR.AT-02 partial match
prevents

Role-based awareness training can reduce the chance developers or admins introduce weak credentials but supplies no enforcement or verification, leaving the bulk of CWE-1391 risk untouched.

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 full match
degrades

Directly requires secure generation, distribution and storage of authentication credentials, eliminating default/hard-coded weak passwords.

A.8.5 Secure authentication full match
degrades

Mandates secure authentication mechanisms that preclude use of weak or default credentials.

A.8.28 Secure coding mostly match
prevents

Secure-coding rules can prohibit hard-coded passwords, yet coverage depends on specific coding standards adopted.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can discover weak credentials, but does not guarantee they are prevented by design.

A.8.9 Configuration management mostly match
prevents

Enforces secure baseline configurations that should remove default credentials, yet does not guarantee credential strength.

A.8.2 Privileged access rights partial match
degrades

Restricts privileged accounts but does not explicitly address default or hard-coded credentials for those accounts.

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).

Oracle Linux 8 (3 rules)
  • V-248667 OL 8 must configure the use of the pam_faillock.so module in the /etc/pam.d/system-auth file. prevents CWE-1391
  • V-248668 OL 8 must configure the use of the pam_faillock.so module in the /etc/pam.d/password-auth file. prevents CWE-1391
  • V-248827 OL 8 must not have the rsh-server package installed. prevents CWE-1391
RHEL 7 (1 rule)
  • V-204442 The Red Hat Enterprise Linux operating system must not have the rsh-server package installed. prevents CWE-1391
RHEL 8 (1 rule)
  • V-244533 RHEL 8 must configure the use of the pam_faillock.so module in the /etc/pam.d/system-auth file. prevents CWE-1391

References