Is CVE-2026-1603 in the CISA KEV catalog?

Yes. CVE-2026-1603 is on the CISA Known Exploited Vulnerabilities list, added 2026-03-09.

What is the CVSS severity of CVE-2026-1603?

CVE-2026-1603 has a CVSS v3 base score of 8.6 (HIGH).

What is the EPSS score for CVE-2026-1603?

CVE-2026-1603 has an EPSS score of 80.56% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-1603?

Upgrade endpoint manager to 2024 or later.

CVE & CISA-KEV Catalog

CVE-2026-1603

HIGHCISA KEVEPSS 100th pctl

8.6

CVSS v3

NVD

Description

An authentication bypass in Ivanti Endpoint Manager before version 2024 SU5 allows a remote unauthenticated attacker to leak specific stored credential data.

CWE-288 CWE-306Missing Authentication for Critical Function

How to fix

Remediation Available

endpoint managerNVD

Affected:< 2024Fixed in:2024CVE-2026-1603derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Exploit Intelligence

80.56%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Remediation due: 2026-03-23

References

Vendor Advisory1

hub.ivanti.com

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-288 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-42793	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2024-1709	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2024-27198	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2025-4427	Medium	5.3	100%	KEV	Fix
CVE-2024-55591	Critical	9.8	98%	KEV + Ransom	Fix
CVE-2023-46747	Critical	9.8	97%	KEV + Ransom	-

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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 2026-03-10.