Threat Intelligence / CVE / CVE-2026-1603

CVE-2026-1603 — Ivanti Endpoint Manager

CISA KEV

CVSS v3.1 8.6 (HIGH) · EPSS 54.8% (higher than 98.0% of all scored CVEs) · Priority 9/10 · Published 2026-02-10

As of 2026-03-10, CVE-2026-1603 is a HIGH-severity vulnerability in Ivanti Endpoint Manager, CVSS v3.1 8.6, EPSS 54.8% (98.0th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-03-09), with a US federal remediation deadline of 2026-03-23. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-1603, most recently “Ivanti Endpoint Manager Pre-Auth Credential Leak via Authentication Bypass (CVE-2026-1603)”.

Last updated: 2026-03-10

What is CVE-2026-1603?

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

The record classifies CVE-2026-1603 under weakness classes CWE-288, CWE-306. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality. 8 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 215 days ago.

Severity and exploitation probability

CVSS v3.1 base score: 8.6 — HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
EPSS (FIRST): 54.8% probability of exploitation in the next 30 days, higher than 98.0% of all scored CVEs
CISA KEV: Listed since 2026-03-09, federal remediation deadline 2026-03-23
Threadlinqs priority: 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
Published: 2026-02-10, last modified 2026-03-10

Is CVE-2026-1603 being exploited?

CISA added CVE-2026-1603 to the Known Exploited Vulnerabilities catalog on 2026-03-09, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-03-23 under BOD 22-01. It currently carries a trending score of 40 in the Threadlinqs vulnerability feed.

Affected products and versions

Ivanti: Endpoint Manager, Endpoint Manager 2024

Showing 2 of 8 recorded product entries.

How to fix CVE-2026-1603

The record marks a vendor fix as available for CVE-2026-1603. Patch reference: https://forums.ivanti.com/s/article/Security-Advisory-EPM-2024-SU5. Vendor advisory: https://hub.ivanti.com/s/article/Security-Advisory-EPM-February-2026-for-EPM-2024?language=en_US. Because CVE-2026-1603 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-03-23. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2026-1603

1 tracked threat in the Threadlinqs corpus references CVE-2026-1603, either in the campaign’s CVE list or as an indicator on the campaign record.

Ivanti Endpoint Manager Pre-Auth Credential Leak via Authentication Bypass (CVE-2026-1603) — CRITICAL · 2026-03-09

Sources

Seeded from research and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

Full detection coverage & IOCs for threats exploiting CVE-2026-1603 are available via the Threadlinqs MCP server (Purple tier). View plans →

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