CVE-2021-21727 — HIGH (7.5)

Q: How severe is CVE-2021-21727?

CVE-2021-21727 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2021-21727?

Check the references section above for vendor advisories and patch information. Affected products include: Zte Zxhn F623 Firmware, Zte Zxhn F623.

Vulnerability Description

A ZTE product has a DoS vulnerability. A remote attacker can amplify traffic by sending carefully constructed IPv6 packets to the affected devices, which eventually leads to device denial of service. This affects:<ZXHN F623><All versions up to V6.0.0P3T33>

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Zte	Zxhn F623 Firmware	< 6.0.0p3t34
Zte	Zxhn F623	-

References

https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014744Vendor Advisory
https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014744Vendor Advisory

FAQ

What is CVE-2021-21727?

CVE-2021-21727 is a vulnerability with a CVSS score of 7.5 (HIGH). A ZTE product has a DoS vulnerability. A remote attacker can amplify traffic by sending carefully constructed IPv6 packets to the affected devices, which eventually leads to device denial of service. ...

How severe is CVE-2021-21727?

CVE-2021-21727 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-21727?

Check the references section above for vendor advisories and patch information. Affected products include: Zte Zxhn F623 Firmware, Zte Zxhn F623.