Security readout for executives and security teams
Plain-English summary
CVE-2020-36979 is a Windows local privilege escalation issue in Atheros Coex Service Application 8.0.0.255. A low-privileged user could abuse an unquoted service path so malicious code runs with elevated rights when the service starts. This is mainly a post-compromise or insider risk, not a remote internet-facing flaw.
Executive priority
Prioritize in endpoint hardening and privilege escalation reduction work. Treat as high priority for shared workstations, managed laptops, and environments where local user compromise is plausible. It is less urgent than remotely exploitable perimeter vulnerabilities.
Technical view
The ZAtheros Bt&Wlan Coex Agent service is reported to use an unquoted executable path, mapped to CWE-428. If writable path locations exist before the intended executable, a local attacker with low privileges may influence service startup and gain SYSTEM-level execution. The CVSS v4 score provided is 8.5 high.
Likely exposure
Exposure is likely limited to Windows endpoints containing Atheros Coex Service Application version 8.0.0.255 and the affected ZAtheros Bt&Wlan Coex Agent service. The bundle provides no CPEs or broad vendor inventory mapping, so asset validation is required.
Exploitation context
A public Exploit-DB entry is cited, but the source bundle does not show CISA KEV listing or confirmed active exploitation. Exploitation requires local access and favorable filesystem/service conditions, making it most relevant after initial compromise or for malicious local users.
Researcher notes
Evidence is limited to the CVE record, VulnCheck advisory, product references, and Exploit-DB reference. No official patch statement is included in the bundle. Avoid assuming affected versions beyond 8.0.0.255 or exploitation in the wild without additional evidence.
Mitigation direction
- Identify endpoints running Atheros Coex Service Application 8.0.0.255.
- Check vendor or OEM guidance for updates or supported remediation.
- If supported, quote the affected Windows service executable path.
- Restrict write permissions on directories in the service path.
- Remove or disable the component where it is not needed.
Validation and detection
- Inventory Windows services for ZAtheros Bt&Wlan Coex Agent.
- Confirm the installed Atheros Coex Service Application version.
- Review the service executable path for missing quotes.
- Check directory permissions along the service path.
- Verify remediation persists after reboot or service restart.
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-428: 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-2020-36979 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
- 8.5 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
8.5HighVector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-49053CVE reference · exploit
- Vendor HomepageCVE reference · product
- Software Download LinkCVE reference · product
- VulnCheck Advisory: Atheros Coex Service Application 8.0.0.255 -'ZAtheros Bt&Wlan Coex Agent' Unquoted Service PathCVE reference · third-party-advisory
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.
Unquoted Search Path or Element
Unquoted Search Path or Element represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.