Security readout for executives and security teams
Plain-English summary
CVE-2026-1603 lets a remote unauthenticated attacker bypass authentication in Ivanti Endpoint Manager and leak specific stored credential data. This is high urgency because credential exposure can support broader compromise. Public sources provided do not show confirmed active exploitation, and CISA KEV is not listing it as exploited in this bundle.
Executive priority
Treat this as a high-priority remediation item if Ivanti Endpoint Manager is deployed. The main business risk is credential exposure, which can enable follow-on access. Prioritize confirming version status, applying vendor guidance, reducing exposure, and rotating sensitive stored credentials.
Technical view
The CVE describes CWE-288 authentication bypass in Ivanti Endpoint Manager before 2024 SU5. CVSS 3.1 is 8.6: network reachable, low complexity, no privileges, no user interaction, changed scope, high confidentiality impact, no integrity or availability impact. The disclosed impact is leakage of specific stored credential data.
Likely exposure
Organizations running Ivanti Endpoint Manager versions before 2024 SU5 are the identified exposure group. Risk is higher where EPM is reachable from untrusted networks or stores privileged credentials. The provided data does not identify other Ivanti products as affected.
Exploitation context
The provided CVE data supports remote unauthenticated exploitation for credential-data leakage. It does not provide proof of active exploitation, public exploit availability, or weaponized details. CISA KEV is referenced, but the bundle marks KEV as false.
Researcher notes
Evidence is limited to the CVE record, Ivanti advisory link, and CISA KEV reference. The version data in the bundle is slightly inconsistent, but the description states affected versions are before 2024 SU5. Do not assume impact beyond credential-data leakage without vendor confirmation.
Mitigation direction
- Review Ivanti’s February 2026 EPM advisory for exact upgrade and remediation instructions.
- Upgrade Ivanti Endpoint Manager to 2024 SU5 or the vendor-recommended fixed release.
- Restrict EPM access to trusted administrative networks where possible.
- Review and rotate exposed or high-value credentials stored in EPM.
Validation and detection
- Inventory Ivanti Endpoint Manager deployments and confirm exact build level.
- Verify whether any deployment is earlier than 2024 SU5.
- Check whether EPM interfaces are reachable from untrusted networks.
- Review vendor advisory indicators, logs, and guidance for suspicious access.
- Confirm credential rotation for sensitive accounts stored in EPM.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-288: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-1603 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.6 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N3.94Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.6HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://hub.ivanti.com/s/article/Security-Advisory-EPM-February-2026-for-EPM-2024?language=en_USCVE reference
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-1603CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Authentication Bypass Using an Alternate Path or Channel
Authentication Bypass Using an Alternate Path or Channel represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.