Medium severity · published Apr 9, 2021
CVE-2021-21728
A ZTE product has a configuration error vulnerability
5.3
CVSS
1%
EPSS
No
On KEV
Description
A ZTE product has a configuration error vulnerability. Because a certain port is open by default, an attacker can consume system processing resources by flushing a large number of packets to the port, and successfully exploiting this vulnerability could reduce system processing capabilities. This affects: ZXA10 C300M all versions up to V4.3P8.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 61% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZC
Zxa10 C300m Firmware · Zte
before 4.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21728
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-21728
Vendor Advisory
https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014784
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