Skip to content
Fencer Vulns
medium 4.3

CVE-2021-21745 json

ZTE MF971R product has a Referer authentication bypass vulnerability.

published 2021-10-20 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-8917

cvss
4.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
55.7%
EPSS 55.7% chance of exploitation in 30 days, percentile 99%
public exploits
0
none known, plus a Nuclei check

Summary

ZTE MF971R product has a Referer authentication bypass vulnerability. Without CSRF verification, an attackercould use this vulnerability to perform illegal authorization operations by sending a request to the user to click.

Exploit prediction

55.71% chance of exploitation in the next 30 days, higher than 99% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template ZTE MF971R - Referer authentication bypass nuclei detection template

CVSS scores

assigned by version score vector
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

  • n/a MF971R

Classification

Weakness
  • CWE-352 Cross-Site Request Forgery

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.