CVE-2021-21727
High
Published: 29 March 2021
Published
29 March 2021
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.0061
70.2th percentile
Risk Priority
15
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2021-21727 is a high-severity an unspecified weakness vulnerability in Zte Zxhn F623 Firmware. Its CVSS base score is 7.5 (High).
Operationally, ranked in the top 29.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-8899
Vulnerability details
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>
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
zte
zxhn f623 firmware
≤ 6.0.0p3t34
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.