Cyber Resilience

CVE-2023-3266

Cyberpower Powerpanel Server ≤ 2.6.9

Published
14 August 2023
Modified
21 November 2024
Patch / advisory
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 0.0082 54th percentile
Risk Priority 73 floored blend · peak EPSS

Summary

CVE-2023-3266 is a critical-severity Improperly Implemented Security Check for Standard (CWE-358) vulnerability in Cyberpower Powerpanel Server. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Downgrade Attack (T1689); ranked in the top 46% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability Data

A non-feature complete authentication mechanism exists in the production application allowing an attacker to bypass all authentication checks if LDAP authentication is selected.An unauthenticated attacker can leverage this vulnerability to log in to the CypberPower PowerPanel Enterprise as an administrator…

more

by selecting LDAP authentication from a hidden HTML combo box. Successful exploitation of this vulnerability also requires the attacker to know at least one username on the device, but any password will authenticate successfully.

CWE(s)

Related Threats

MITRE ATT&CK Enterprise Techniques

T1689 Downgrade Attack Defense Impairment
Adversaries may downgrade or use a version of system features that may be outdated, vulnerable, and/or does not support updated security controls.
T1557 Adversary-in-the-Middle Credential Access
Adversaries may attempt to position themselves between two or more networked devices using an adversary-in-the-middle (AiTM) technique to support follow-on behaviors such as [Network Sniffing](https://attack.
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-3265Same product: Cyberpower Powerpanel Server
CVE-2023-3267Same product: Cyberpower Powerpanel Server
CVE-2024-27842Shared CWE-358
CVE-2026-49783Shared CWE-358
CVE-2023-2585Shared CWE-358
CVE-2025-31969Shared CWE-358
CVE-2024-25545Shared CWE-358
CVE-2024-41907Shared CWE-358
CVE-2024-5500Shared CWE-358
CVE-2024-23592Shared CWE-358

Affected Assets

cyberpower
powerpanel server
≤ 2.6.9

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

Detect
Catch it (NIST detect / respond)

Harden
Shrink the surface (DISA STIG)

Validate
Prove the fix (OWASP ASVS)
  • V17.2.8

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.

addresses: CWE-358

Assessments identify and document improperly implemented security checks, allowing fixes that reduce exploitation of flawed checks.

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.PS-06 mostly match
prevents

Secure SDLC practices directly require correct implementation of standardized security checks and algorithms.

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.

finds

Security testing in development and acceptance validates that required security checks function as specified.

prevents

Use of cryptography control depends on correct implementation of standardized cryptographic checks.

prevents

Secure development life cycle mandates verification that security checks required by standards are correctly implemented.

prevents

Application security requirements explicitly call for correct implementation of standardized security mechanisms.

prevents

Secure system architecture and engineering principles require faithful realization of protocol-level security checks.

prevents

Secure coding practices directly address correct implementation of security-relevant checks in standardized algorithms.

References