High severity · published Dec 21, 2020
CVE-2020-6881
ZTE E8810/E8820/E8822 series routers have an MQTT DoS vulnerability, which is caused by the failure of the device to verify the validity of abnormal messages
7.5
CVSS
0.6%
EPSS
No
On KEV
Description
ZTE E8810/E8820/E8822 series routers have an MQTT DoS vulnerability, which is caused by the failure of the device to verify the validity of abnormal messages. A remote attacker could connect to the MQTT server and send an MQTT exception message to the specified device, which will cause the device to deny service. This affects:<ZXHN E8810, ZXHN E8820, ZXHN E8822><E8810 V1.0.26, E8810 V2.0.1, E8820 V1.1.3L, E8820 V2.0.13, E8822 V2.0.13>
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZE
Zxhn E8810 Firmware · Zte
1.0.26; 2.0.1 · source: NVD
ZE
Zxhn E8820 Firmware · Zte
1.1.3; 2.0.13 · source: NVD
ZE
Zxhn E8822 Firmware · Zte
2.0.13 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-6881
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-6881
Vendor Advisory
http://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014202
More from Zxhn E8810 Firmware
7.5
CVE-2020-6882
ZTE E8810/E8820/E8822 series routers have an information leak vulnerability, which is caused by hard-coded MQTT service access credentials on the device