CVE-2021-21726 Denial of service in <ZXONE 9700 , ZXONE 8700, ZXONE 19700>
High-privilege attackers can cause denial of service in ZTE optical network devices by repeatedly inputting illegal parameters into the diagnostic interface.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-21726?
CVE-2021-21726 is a low-severity denial of service vulnerability in <ZXONE 9700 , ZXONE 8700, ZXONE 19700>, published on 12 Mar 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Some ZTE products have an input verification vulnerability in the diagnostic function interface. Due to insufficient verification of some parameters input by users, an attacker with high privileges can cause process exception by repeatedly inputting illegal parameters. This affects:<ZXONE 9700 , ZXONE 8700, ZXONE 19700><V1.40.021.021CP049, V1.0P02B219_@NCPM-RELEASE_2.40R1-20200914.set>
Weakness: CWE-20
Which versions are affected by CVE-2021-21726?
It affects 3 products.
Products include Zte Zxone 19700 Firmware, Zte Zxone 8700 Firmware, Zte Zxone 9700 Firmware.
How do I fix CVE-2021-21726?
No fix has been published for CVE-2021-21726 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-21726 being exploited?
There is no known exploitation of CVE-2021-21726 in the wild and no public exploit code.
Sources
Also known as GHSA-gp9j-h6cw-964w.