How severe is CVE-2023-3266?

CVE-2023-3266 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-3266 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-3266?

CVE-2023-3266 affects Cyberpower Powerpanel Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-3266?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-3266 published?

CVE-2023-3266 was published on 2023-08-14 and last updated on 2026-06-17.

CVE-2023-3266

CVE-2023-3266 is a critical-severity vulnerability in Cyberpower Powerpanel Server with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-358.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-358
Affected product: Cyberpower Powerpanel Server
Published: 2023-08-14
Last modified: 2026-06-17

Description

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 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.

Frequently asked questions

What is CVE-2023-3266?: 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 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.
How severe is CVE-2023-3266?: CVE-2023-3266 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-3266 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-3266?: CVE-2023-3266 affects Cyberpower Powerpanel Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-3266?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-3266 published?: CVE-2023-3266 was published on 2023-08-14 and last updated on 2026-06-17.

References

https://www.trellix.com/en-us/about/newsroom/stories/research/the-threat-lurking-in-data-centers.html

Affected products (1)

cpe:2.3:a:cyberpower:powerpanel_server:*:*:*:*:enterprise:*:*:*

More vulnerabilities in Cyberpower Powerpanel Server

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CVE-2023-3260 — High (CVSS 7.2): The Dataprobe iBoot PDU running firmware version 1.43.03312023 or earlier is vulnerable to command injection via the…
CVE-2023-3264 — Medium (CVSS 6.7): The Dataprobe iBoot PDU running firmware version 1.43.03312023 or earlier uses hard-coded credentials for all…

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