Is CVE-2026-4320 in the CISA KEV catalog?

No. CVE-2026-4320 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-4320?

CVE-2026-4320 has a CVSS v4 base score of 9.3 (CRITICAL).

What is the EPSS score for CVE-2026-4320?

CVE-2026-4320 has an EPSS score of 0.25% (17th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2026-4320

CRITICAL

9.3

CVSS v4

NVD

Description

Authorization Bypass vulnerability in Creartia's ICMS software could allow an attacker to gain unauthorized access to protected features by manipulating the HTTP redirect headers of the login process, causing the script to continue running and enabling privilege escalation without the need for credentials.

CWE-288

CVSS v4 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

Impact

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Exploit Intelligence

0.25%probability of exploitation in 30 days

17thpercentile

Low risk: more likely to be exploited than 17% of all known CVEs.

References

https://www.incibe.es/en/incibe-cert/notices/aviso/authorization-bypass-icms-content-management-creartia-internet-consulting

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.