Security readout for executives and security teams
Plain-English summary
This flaw affects some Intel Wireless Bluetooth and Killer Bluetooth products before version 22.120. A person who already has local authenticated access to an affected system could potentially gain higher privileges. The business risk is endpoint compromise after an initial foothold, not direct remote compromise from the internet.
Executive priority
Treat this as a high-priority endpoint hygiene issue. It is less urgent than an internet-facing remote code execution flaw, but important where attackers may gain standard user access and then escalate privileges.
Technical view
CVE-2021-33847 is a CWE-119 improper buffer restriction issue in Bluetooth firmware. CVSS 3.1 is 7.8 with local attack vector, low complexity, low privileges required, no user interaction, unchanged scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely on laptops, desktops, and managed endpoints using affected Intel Wireless Bluetooth or Killer Bluetooth products with firmware before 22.120. The provided sources do not enumerate every affected adapter model.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. Exploitation requires local authenticated access, so the main concern is privilege escalation after phishing, malware, or misuse of a standard user account.
Researcher notes
Evidence is limited to the CVE record and Intel advisory reference in the bundle. Do not assume remote attackability, active exploitation, or affected model details beyond the named Intel Wireless Bluetooth and Killer Bluetooth product families before 22.120.
Mitigation direction
- Update affected Intel Wireless Bluetooth and Killer Bluetooth firmware to version 22.120 or later.
- Follow Intel advisory INTEL-SA-00628 and OEM guidance for supported update channels.
- Prioritize managed endpoints where standard users can sign in locally.
- Track exceptions for devices that cannot be updated promptly.
Validation and detection
- Inventory endpoints for Intel Wireless Bluetooth and Killer Bluetooth hardware.
- Confirm installed firmware or driver package reports version 22.120 or later.
- Check vulnerability scanner findings against the Intel advisory and CVE identifier.
- Document unaffected systems where no affected Bluetooth product is present.
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-119: 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-2021-33847 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://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00628.htmlCVE 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.
Improper Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.