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Fencer Vulns
high 8.6

CVE-2022-43389 json

A buffer overflow vulnerability in the library of the web server in Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an un…

published 2023-01-11 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-46428

cvss
8.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

A buffer overflow vulnerability in the library of the web server in Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an unauthenticated attacker to execute some OS commands or to cause denial-of-service (DoS) conditions on a vulnerable device.

Patch / fix

  • zyxel lte3202-m437_firmware 1.00\(abwf.1\)c0
  • zyxel lte3316-m604_firmware 2.00\(abmp.6\)c0
  • zyxel lte7480-m804_firmware 1.00\(abra.6\)c0
  • zyxel lte7490-m904_firmware 1.00\(abqy.5\)c0
  • zyxel nebula_fwa510_firmware 1.15\(acgd.3\)c0
  • zyxel nebula_fwa710_firmware 1.15\(acgc.3\)c0
  • zyxel nebula_nr7101_firmware 1.15\(accc.3\)c0
  • zyxel nr5103_firmware 4.19\(abyc.3\)c0
  • zyxel nr7101_firmware 1.00\(abuv.7\)c0
  • zyxel nr7102_firmware 1.00\(abyd.2\)c0
  • zyxel nr7103_firmware 1.00\(accz.1\)c0

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
19 mo ago

Exploit prediction

0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Zyxel NR7101 firmware

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

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.