Security readout for executives and security teams
Plain-English summary
Android 13 has a local privilege escalation flaw tied to improper cryptographic use that could allow a boot partition replacement. Successful exploitation could compromise device confidentiality, integrity, and availability. The issue is local and does not require user interaction, but public sources provided do not show active exploitation.
Executive priority
Treat as a high-priority mobile patching issue, especially for Android fleets handling sensitive data. It is not currently evidenced as actively exploited in the supplied sources, but the potential full-device impact justifies prompt remediation tracking.
Technical view
CVE-2023-20940 is a CWE-347 improper cryptographic verification issue in Android 13. The CVSS 3.1 score is 7.8 with local attack vector, low complexity, low privileges required, no user interaction, and high impact across confidentiality, integrity, and availability.
Likely exposure
Exposure is limited to Android 13 devices that have not received the relevant Android or OEM security update covering the February 2023 bulletin. Device build and security patch level determine practical exposure.
Exploitation context
The CVE describes local escalation of privilege with no user interaction. KEV status is false in the supplied bundle, and no cited source confirms exploitation in the wild. Public technical detail is limited.
Researcher notes
The record identifies the affected platform and impact but does not provide root-cause detail, exploit primitives, or patch diff context. Validation should rely on security patch level and OEM advisory mapping rather than assumptions about all Android 13 builds.
Mitigation direction
- Review the Android February 2023 security bulletin and relevant OEM guidance.
- Update affected Android 13 devices to a vendor build that includes the fix.
- Verify managed devices meet minimum approved Android security patch levels.
- Prioritize shared, BYOD, and high-privilege user devices for remediation.
Validation and detection
- Inventory Android 13 devices across MDM, EDR, and asset systems.
- Check each device security patch level against vendor guidance for CVE-2023-20940.
- Confirm OEM builds explicitly include the Android February 2023 security bulletin content.
- Review exceptions for unsupported devices or delayed carrier/OEM updates.
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-347: 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 lookupCVE-2023-20940 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
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://source.android.com/security/bulletin/2023-02-01CVE reference
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.
Improper Verification of Cryptographic Signature
Improper Verification of Cryptographic Signature represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.