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CVE-2021-21727

HIGHCVSS 7.5/10EPSS 1.39%

Last modified

CVE-2021-21727 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 1.39% chance of exploitation in the next 30 days.

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>

Metrics

CVSS 3.1
7.5/10

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

EPSS Probability
1.39%

68.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
ZteZxhn F623 Firmware< 6.0.0p3t34

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-21727?
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>
How severe is CVE-2021-21727?
CVE-2021-21727 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.39% probability of exploitation in the next 30 days.
How do I fix CVE-2021-21727?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21727?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST