What is the CVSS score of EUVD-2026-78958?

EUVD-2026-78958 has a CVSS 3.1 base score of 6.2 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.1%.

Google EUVD-2026-78958

| CVE-2026-56888 MEDIUM

Observable Discrepancy (CWE-203)

2026-09-15 Google_Devices

GHSA-pc66-c4rr-339x

Privilege Escalation Information Disclosure Google

6.2

CVSS 3.1 · Vendor: Google_Devices

View

Vulnerability Assessment

Weakness

CWE

CWE-203

ASVS 5.0

V6 - Authentication Timing-safe comparisons

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 15, 2026

A permission bypass in Google Android stemming from a side-channel information disclosure (CWE-203) allows a local attacker holding only low-privileged code execution to escalate privileges without any user interaction. The flaw yields high confidentiality impact (CVSS 5.5, AV:L/AC:L/PR:L/UI:N) by leaking observable discrepancies that undermine permission enforcement, though the vendor vector records no integrity or availability impact. It is addressed in the September 2026 Android/Pixel security bulletin; no public exploit code or CISA KEV listing was identified in the supplied intelligence at time of analysis.

Affected VersionsENISA

Android Android kernel

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (Google_Devices) PRIMARY 6.2 MEDIUM

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

Primary rating from Vendor (Google_Devices) · only source for this CVE.

CVSS VectorVendor: Google_Devices

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

CVSS changed

Sep 16, 2026 - 17:22 NVD

5.5 (MEDIUM) 6.2 (MEDIUM)

CVE Published

Sep 15, 2026 - 18:33 cve.org

UNKNOWN (no severity yet)

CVE Published

Sep 15, 2026 - 18:33 cve.org

MEDIUM 5.5

DescriptionCVE.org

In multiple locations, there is a possible permission bypass due to side channel information disclosure. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Threat Intelligence Overview

EPSS Score

0.1%

Top 100% exploitable

Data Quality

4 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Defer

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +31

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Privilege Escalation HIGH

Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.