CVE-2019-18989
A partial authentication bypass vulnerability exists on Mediatek MT7620N 1.06 devices. The...
A partial authentication bypass vulnerability exists on Mediatek MT7620N 1.06 devices. The vulnerability allows sending an unencrypted data frame to a WPA2-protected WLAN router where the packet is routed through the network. If successful, a response is sent back as an encrypted frame, which would allow an attacker to discern information or potentially modify data.
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
A partial authentication bypass vulnerability exists on Mediatek MT7620N 1.06 devices. The vulnerability allows sending an unencrypted data frame to a WPA2-protected WLAN router where the packet is routed through the network. If successful, a response is sent back as an encrypted frame, which would allow an attacker to discern information or potentially modify data.
- Record
CVE-2019-18989- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AC:L/AV:A/A:N/C:L/I:L/PR:N/S:C/UI:N - Updated
- 2026-11-02
EUVDEUVD-2019-8643
A partial authentication bypass vulnerability exists on Mediatek MT7620N 1.06 devices. The vulnerability allows sending an unencrypted data frame to a WPA2-protected WLAN router where the packet is routed through the network. If successful, a response is sent back as an encrypted frame, which would allow an attacker to discern information or potentially modify data.
- Record
EUVD-2019-8643- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AC:L/AV:A/A:N/C:L/I:L/PR:N/S:C/UI:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4p7h-q24r-h439 No score
A partial authentication bypass vulnerability exists on Mediatek MT7620N 1.06 devices. The...
A partial authentication bypass vulnerability exists on Mediatek MT7620N 1.06 devices. The vulnerability allows sending an unencrypted data frame to a WPA2-protected WLAN router where the packet is routed through the network. If successful, a response is sent back as an encrypted frame, which would allow an attacker to discern information or potentially modify data.
- Record
GHSA-4p7h-q24r-h439- Weakness
- CWE-287
- Updated
- 2026-11-02
NVD
A partial authentication bypass vulnerability exists on Mediatek MT7620N 1.06 devices. The vulnerability allows sending an unencrypted data frame to a WPA2-protected WLAN router where the packet is routed through the network. If successful, a response is sent back as an encrypted frame, which would allow an attacker to discern information or potentially modify data.
- Record
CVE-2019-18989- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N - CVSS 2.0
- 4.8 Medium
AV:A/AC:L/Au:N/C:P/I:P/A:N - Weakness
- CWE-290
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-18989 is a medium vulnerability (CVSS 6.1) in Mediatek Mt7620n Firmware, published September 30, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.75%, the 55th percentile. No source names a fixed version.