Security readout for executives and security teams
Plain-English summary
This is a Microsoft AV1 Video Extension remote code execution issue. If a vulnerable endpoint has the affected extension and a user interacts with malicious AV1 media, an attacker could gain code execution with high impact to confidentiality, integrity, and availability. The sources do not provide technical root cause details.
Executive priority
Treat this as a high-priority endpoint patching item, not an internet-facing emergency. The impact is severe if exploited, but the available evidence indicates user interaction is required and does not show known active exploitation.
Technical view
CVE-2020-17105 affects Microsoft AV1 Video Extension, with CPE evidence for version 1.1.51091.0. CVSS 3.1 is 7.8: local attack vector, low complexity, no privileges required, user interaction required, unchanged scope, and high confidentiality, integrity, and availability impact. Official remediation is indicated by the CVSS remediation level.
Likely exposure
Exposure is most likely on Windows endpoints where Microsoft AV1 Video Extension is installed, especially systems used to handle untrusted media. The provided data lists affected versions as N/A, with one CPE version identified, so inventory should verify installed package versions against Microsoft guidance.
Exploitation context
The source bundle does not show active exploitation. It is not listed as KEV, and the CVSS exploit maturity value is unproven. User interaction is required, so phishing, downloaded media, or other user-driven content workflows are the most relevant risk context.
Researcher notes
Public source details are sparse. The CVSS vector indicates local attack context with required user interaction, despite the RCE title. Do not assume network-reachable exploitation or broad product impact beyond Microsoft AV1 Video Extension unless Microsoft documentation confirms it.
Mitigation direction
- Apply the official Microsoft AV1 Video Extension update or remediation guidance.
- Inventory endpoints for Microsoft AV1 Video Extension installations.
- Prioritize systems that process untrusted or externally supplied media.
- Restrict unnecessary media handling on high-risk endpoints until remediated.
- Monitor Microsoft MSRC guidance for version-specific remediation details.
Validation and detection
- Confirm whether Microsoft AV1 Video Extension is installed on endpoints.
- Compare installed extension versions against Microsoft MSRC guidance.
- Verify the official update is applied after remediation.
- Check vulnerability management tooling for CVE-2020-17105 detection status.
- Document exceptions where the extension remains installed and unpatched.
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.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-17105 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:N/UI:R/S:U/C:H/I:H/A:H/E:U/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.
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:N/UI:R/S:U/C:H/I:H/A:H/E:U/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:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17105CVE reference · x_refsource_MISC
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.