What is the CVSS score of CVE-2020-36923?

CVE-2020-36923 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Is there a public PoC exploit available for CVE-2020-36923?

Yes, a public proof-of-concept exploit is available for CVE-2020-36923. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2020-36923?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. Monitor vendor channels for patch availability.

Bravia Signage CVE-2020-36923

CRITICAL

Authorization Bypass Through User-Controlled Key (CWE-639)

2026-01-06 disclosure@vulncheck.com

Authentication Bypass Bravia Signage Sony

9.8

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-639 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V8 - Authorization Object-level authorization, IDOR prevention
Impact	CVSS 9.8 (Critical). No auth, network vector, low complexity. PoC available. Digital signage systems in public locations could be used to display unauthorized content. EPSS 0.18%.
Exploit ScenarioDerived	An attacker accesses the Sony BRAVIA signage web interface, navigates directly to /#/content-creation, and uploads inappropriate or malicious content to be displayed on public-facing screens.

Act Now Prioritize within 24-48h. Why: CRITICAL severity + public POC available.

No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Sony BRAVIA Digital Signage 1.7.8 has an IDOR vulnerability that allows attackers to access hidden system resources like /#/content-creation by bypassing client-side access restrictions. PoC available.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:54 CVSS 9.8

Sony BRAVIA Digital Signage allows unauthorized access to hidden admin functionality through client-side access control bypass.

RemediationAI

Contact Sony for firmware updates. Implement network-level access controls to restrict management interface access. Move signage management to an isolated VLAN.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Access controls are implemented only on the client side (CWE-639). Direct URL navigation to restricted resources like /#/content-creation works without server-side authorization checks. This provides access to content management and potentially device configuration.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

PoC Detected

Jan 22, 2026 - 21:15 vuln.today

Public exploit code

CVE Published

Jan 06, 2026 - 16:15 nvd

CRITICAL 9.8

DescriptionCVE.org

Sony BRAVIA Digital Signage 1.7.8 contains an insecure direct object reference vulnerability that allows attackers to bypass authorization controls. Attackers can access hidden system resources like '/#/content-creation' by manipulating client-side access restrictions.

Executive ViewAI

Why It Matters

Organizations using Sony BRAVIA Digital Signage 1.7.8 face critical risk from CVE-2020-36923, a IDOR vulnerability rated CVSS 9.8. Successful exploitation could critically impact the confidentiality, integrity, and availability of affected systems. Proof-of-concept code is publicly available, increasing the risk of exploitation. Organizations should apply vendor updates immediately when available and implement compensating controls in the interim.

Business Impact: Severe

Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.

Threat Intelligence Overview

EPSS Score

0.2%

Top 61% exploitable

Exploit

POC

Public exploit code exists

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

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 CRITICAL

CISA KEV No

Public POC Yes

EPSS 0.2%

Patch available No

Active threat No

Deciding rule

CRITICAL severity + public POC available

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.