Cyber Resilience

CVE-2026-103470

Published
30 September 2026
Modified
30 September 2026
CVSS Score v4 9.3
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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:N/R:U/V:X/RE:L/U:Red
EPSS Score 0.0026 16th percentile
Risk Priority 70 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2026-103470 is a critical-severity Incorrect Privilege Assignment (CWE-266) vulnerability in Internet2 Grouper (inferred from references). Its CVSS base score is 9.3 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Valid Accounts (T1078); ranked at the 16th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-2 (Account Management) and AC-3 (Access Enforcement) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability Data

In Internet2 Grouper before 7.5.1 (in some configurations), a user who is allowed to create or edit rules in the User Interface can escalate privileges.

CWE(s)

Related Threats

MITRE ATT&CK Enterprise Techniques

T1078 Valid Accounts Stealth
Adversaries may obtain and abuse credentials of existing accounts as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion.
T1548 Abuse Elevation Control Mechanism Privilege Escalation
Adversaries may circumvent mechanisms designed to control privilege elevation to gain higher-level permissions.
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-0871Shared CWE-266
CVE-2023-40109Shared CWE-266
CVE-2025-43260Shared CWE-266
CVE-2026-73347Shared CWE-266
CVE-2026-23550Shared CWE-266
CVE-2023-47140Shared CWE-266
CVE-2025-49379Shared CWE-266
CVE-2025-48911Shared CWE-266
CVE-2026-32530Shared CWE-266
CVE-2025-69138Shared CWE-266

Affected Assets

Internet2
Grouper
inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)
  • 8 hardening rules · 6 OS baselines
Validate
Prove the fix (OWASP ASVS)

—

Mitigating Controls (NIST 800-53 r5) AI

Account management defines and authorizes the exact privileges granted to each account or role.

Enforces only the authorizations that were assigned, so correct assignment is a prerequisite.

Separation of duties constrains which privilege combinations may be assigned to any actor.

Least privilege directly requires that only the minimal necessary privileges are assigned to each actor.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.AA-05 partial match
prevents

Directly enforces least-privilege policy definition, management, and review that prevents incorrect privilege assignments.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

removes
prevents

A.5.15 directly requires determining access needs, defining/enforcing topic-specific access control policy and rules (including need-to-know, privilege restrictions, segregation, formal authorization, role-based mapping, and consistency with classification), which stops most incorrect privilege assignments from being exploitable; the bounded remainder is incorrect assignments that arise from flawed implementation of those rules rather than from their absence.

removes
prevents

A.5.18's provisioning, review, revocation and SoD rules (esp. a,b,c,f,i,j) directly stop most incorrect privilege assignments from being granted or persisting, with a bounded remainder in flawed implementation of the authorization step itself (see 5.9/5.15 dependency)

removes

Hardening callouts derived

Configuration rules from DISA STIG baselines that bear on weaknesses of the type cited by this CVE. Each rule is shown with the relationship its mapping actually records, against the CWE it was authored against. Derived via CVE→CWE over `controls_xwalks` (higher-evidence rows only; rows rated `none` are excluded).

Oracle Linux 8 (1 rule)
  • V-248551 A sticky bit must be set on all OL 8 public directories to prevent unauthorized and unintended information transferred via shared system resources. prevents CWE-266
Oracle Linux 9 (1 rule)
  • V-271779 OL 9 must be configured so that a sticky bit must be set on all public directories. prevents CWE-266
RHEL 8 (1 rule)
  • V-230243 A sticky bit must be set on all RHEL 8 public directories to prevent unauthorized and unintended information transferred via shared system resources. prevents CWE-266
RHEL 9 (1 rule)
  • V-257929 A sticky bit must be set on all RHEL 9 public directories. prevents CWE-266
Ubuntu 22.04 (2 rules)
  • V-260513 Ubuntu 22.04 LTS must set a sticky bit on all public directories to prevent unauthorized and unintended information transferred via shared system resources. prevents CWE-266
  • V-260559 Ubuntu 22.04 LTS must ensure only users who need access to security functions are part of sudo group. prevents CWE-266
Ubuntu 24.04 (2 rules)
  • V-270748 Ubuntu 24.04 LTS must ensure only users who need access to security functions are part of sudo group. prevents CWE-266
  • V-270750 Ubuntu 24.04 LTS must set a sticky bit on all public directories to prevent unauthorized and unintended information transferred via shared system resources. prevents CWE-266

References