CVE-2020-36923
Published: 06 January 2026
Summary
CVE-2020-36923 is a medium-severity Authorization Bypass Through User-Controlled Key (CWE-639) vulnerability in Sony Bravia Signage. Its CVSS base score is 6.9 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 44.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SC-14 (Public Access Protections).
Deeper analysis
CVE-2020-36923 is an insecure direct object reference vulnerability (CWE-639) in Sony BRAVIA Digital Signage version 1.7.8. The flaw enables attackers to bypass authorization controls by manipulating client-side access restrictions, allowing unauthorized access to hidden system resources such as '/#/content-creation'.
With a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), the vulnerability is exploitable over the network by unauthenticated attackers requiring low complexity and no user interaction. Exploitation can result in high impacts to confidentiality, integrity, and availability, as attackers gain access to restricted system resources.
Advisories and related resources for mitigation details are available at the following references: https://cxsecurity.com/issue/WLB-2020120031, https://exchange.xforce.ibmcloud.com/vulnerabilities/192607, https://packetstormsecurity.com/files/160344, https://pro-bravia.sony.net, and https://pro-bravia.sony.net/resources/software/bravia-signage/.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-0956
Vulnerability details
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.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The IDOR vulnerability in the Sony BRAVIA Digital Signage web interface allows unauthenticated remote attackers to bypass authorization and access hidden system resources, directly mapping to exploitation of a public-facing application.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Enforces approved authorizations for access to system resources, directly preventing IDOR bypasses of client-side restrictions via server-side checks.
Protects publicly accessible interfaces from unauthorized use, mitigating network-exploitable unauthenticated access to hidden resources like '/#/content-creation'.
Validates manipulated inputs such as object references, reducing the risk of insecure direct object reference exploitation.