Security readout for executives and security teams
Plain-English summary
CVE-2020-1464 is a Windows file-signature validation flaw. An attacker with local access and low privileges could make Windows trust and load files that are not properly signed, weakening a key security control used to block untrusted code.
Executive priority
Treat this as a high-priority Windows remediation item. It affects trust in file signatures, is KEV-listed, and can undermine security features that prevent untrusted code from loading.
Technical view
Microsoft describes a spoofing vulnerability in Windows signature validation that can bypass protections against loading improperly signed files. The CVSS vector is local, low complexity, low privilege, no user interaction, with high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely on affected Windows 7 SP1, Windows 10 1507 through 2004, Windows Server 2016, Windows Server 2019, and related Server Core installations that have not received Microsoft’s CVE-2020-1464 update.
Exploitation context
CISA lists CVE-2020-1464 in the Known Exploited Vulnerabilities catalog, so known exploitation is supported. The provided bundle does not include specific active campaign details, affected organizations, or current exploitation volume.
Researcher notes
Key constraints are local attack vector and low privileges, with no user interaction. CWE-347 maps to improper cryptographic signature verification. Public references discuss the issue history, but the bundle’s defensible facts are Microsoft’s advisory, CVSS, affected products, and CISA KEV status.
Mitigation direction
- Apply Microsoft’s security update for CVE-2020-1464 on affected Windows systems.
- Prioritize remediation because the CVE is listed in CISA KEV.
- Inventory affected Windows client and server versions, including Server Core installations.
- Check Microsoft guidance for systems without an applicable supported update.
- Reduce exposure of unpatched systems until remediation is verified.
Validation and detection
- Compare endpoint and server inventory against the affected product list.
- Verify CVE-2020-1464 update installation through patch management reports.
- Confirm no affected unsupported systems remain in sensitive roles.
- Review security telemetry for suspicious improperly signed file loads.
- Document exceptions and compensating controls for any unpatched assets.
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-2020-1464 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
- Yes
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
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.
CISA KEV status
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:H/E:P/RL:O/RC:C1.85.9Primary 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/E:P/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://medium.com/%40TalBeerySec/glueball-the-story-of-cve-2020-1464-50091a1f98bdCVE reference · x_refsource_MISC
- https://krebsonsecurity.com/2020/08/microsoft-put-off-fixing-zero-day-for-2-years/CVE reference · x_refsource_MISC
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1464CVE reference · x_refsource_MISC
- https://blog.virustotal.com/2019/01/distribution-of-malicious-jar-appended.htmlCVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1464CVE reference · government-resource
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.