How severe is CVE-2024-5539?

CVE-2024-5539 has a CVSS 4.0 base score of 9.2, rated critical severity.

Is CVE-2024-5539 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2024-5539?

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.

Does CVE-2024-5539 have an EU (EUVD) identifier?

Yes. CVE-2024-5539 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-55103.

When was CVE-2024-5539 published?

CVE-2024-5539 was published on 2025-11-27 and last updated on 2026-06-17.

CVE-2024-5539

CVE-2024-5539 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.2. 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-863.

Key facts

Severity: Critical (CVSS 4.0 base score 9.2)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-55103
Weakness: CWE-863
Published: 2025-11-27
Last modified: 2026-06-17

Description

The Access Control Bypass vulnerability found in ALC WebCTRL and Carrier i-Vu in versions up to and including 8.5 allows a malicious actor to bypass intended access restrictions and expose sensitive information via the web based building automation server.

Frequently asked questions

What is CVE-2024-5539?: The Access Control Bypass vulnerability found in ALC WebCTRL and Carrier i-Vu in versions up to and including 8.5 allows a malicious actor to bypass intended access restrictions and expose sensitive information via the web based building automation server.
How severe is CVE-2024-5539?: CVE-2024-5539 has a CVSS 4.0 base score of 9.2, rated critical severity.
Is CVE-2024-5539 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2024-5539?: 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.
Does CVE-2024-5539 have an EU (EUVD) identifier?: Yes. CVE-2024-5539 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-55103.
When was CVE-2024-5539 published?: CVE-2024-5539 was published on 2025-11-27 and last updated on 2026-06-17.

References

https://www.corporate.carrier.com/product-security/advisories-resources/

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