Buffer overflow in Ubiquiti airMAX AC
Priority LOW 38CWE-120Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.
Summary
A malicious actor in Wi-Fi range of the affected product could leverage a vulnerability in the airMAX Wireless Protocol to achieve a remote code execution (RCE) within the affected product.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00392 33rd percentileScored 2026-11-07
Fix Fixed airMAX AC (Ubiquiti Inc): 8.7.21airMAX M (Ubiquiti Inc): 6.3.24+2 more products
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Ubiquiti | airMAX AC | before 8.7.21 | 8.7.21 | Patch available | CNA |
| Ubiquiti | airMAX M | before 6.3.24 | 6.3.24 | Patch available | CNA |
| Ubiquiti | airFiber AF60-XG | before 1.2.3 | 1.2.3 | Patch available | CNA |
| Ubiquiti | airFiber AF60 | before 2.6.8 | 2.6.8 | Patch available | CNA |
- airMAX AC VendorUbiquiti Affected before 8.7.21 Fixed in 8.7.21 Patch available CNA
- airMAX M VendorUbiquiti Affected before 6.3.24 Fixed in 6.3.24 Patch available CNA
- airFiber AF60-XG VendorUbiquiti Affected before 1.2.3 Fixed in 1.2.3 Patch available CNA
- airFiber AF60 VendorUbiquiti Affected before 2.6.8 Fixed in 2.6.8 Patch available CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:ui:airmax_ac_firmware:*:*:*:*:*:*:*:* | before 8.7.21 | Vulnerable | Ubiquiti |
| cpe:2.3:h:ui:airmax_ac:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Ubiquiti |
| cpe:2.3:o:ui:airmax_m_firmware:*:*:*:*:*:*:*:* | before 6.3.24 | Vulnerable | Ubiquiti |
| cpe:2.3:h:ui:airmax_m:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Ubiquiti |
| cpe:2.3:o:ui:airfiber_af60-xg_firmware:*:*:*:*:*:*:*:* | before 1.2.3 | Vulnerable | Ubiquiti |
| cpe:2.3:h:ui:airfiber_af60-xg:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Ubiquiti |
| cpe:2.3:o:ui:airfiber_af60_firmware:*:*:*:*:*:*:*:* | before 2.6.8 | Vulnerable | Ubiquiti |
| cpe:2.3:h:ui:airfiber_af60:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Ubiquiti |
- cpe:2.3:o:ui:airmax_ac_firmware:*:*:*:*:*:*:*:* Versions before 8.7.21 Vulnerable ·Ubiquiti
- cpe:2.3:h:ui:airmax_ac:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Ubiquiti
- cpe:2.3:o:ui:airmax_m_firmware:*:*:*:*:*:*:*:* Versions before 6.3.24 Vulnerable ·Ubiquiti
- cpe:2.3:h:ui:airmax_m:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Ubiquiti
- cpe:2.3:o:ui:airfiber_af60-xg_firmware:*:*:*:*:*:*:*:* Versions before 1.2.3 Vulnerable ·Ubiquiti
- cpe:2.3:h:ui:airfiber_af60-xg:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Ubiquiti
- cpe:2.3:o:ui:airfiber_af60_firmware:*:*:*:*:*:*:*:* Versions before 2.6.8 Vulnerable ·Ubiquiti
- cpe:2.3:h:ui:airfiber_af60:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Ubiquiti
Remediation
- Fix · CNA airMAX AC (Ubiquiti Inc) Fixed in 8.7.21
- Fix · CNA airMAX M (Ubiquiti Inc) Fixed in 6.3.24
- Fix · CNA airFiber AF60-XG (Ubiquiti Inc) Fixed in 1.2.3
- Fix · CNA airFiber AF60 (Ubiquiti Inc) Fixed in 2.6.8
Timeline
- 2026-10-02 Threatist record created from CVE-2026-21639
- 2026-10-03 Alias added: GHSA-9vw7-2gjw-jc6x
References
Sources
- CVE-2026-21639 · CVE Program
- CVE-2026-21639 · NVD
- FIRST EPSS
- GHSA-9vw7-2gjw-jc6x · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences