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Fencer Intel
medium 6.5

CVE-2022-43391 json

A buffer overflow vulnerability in the parameter of the CGI program in Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an…

published 3y ago modified 4mo ago also EUVD-2022-46430

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 55%
public exploits
0
none known

Summary

A buffer overflow vulnerability in the parameter of the CGI program in Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an authenticated attacker to cause denial-of-service (DoS) conditions by sending a crafted HTTP request.

Patch / fix

  • zyxel lte7480-m804_firmware 1.00\(abra.6\)c0
  • zyxel lte7490-m904_firmware 1.00\(abqy.5\)c0
  • zyxel nebula_lte3301-plus_firmware 1.15\(acca.3\)c0
  • zyxel nebula_lte7461-m602_firmware 1.15\(acev.3\)c0
  • zyxel nebula_nr5101_firmware 1.15\(accg.3\)c0
  • zyxel nebula_nr7101_firmware 1.15\(accc.3\)c0
  • zyxel nr5101_firmware 1.00\(abvc.6\)c0
  • zyxel nr7101_firmware 1.00\(abuv.7\)c0
  • zyxel nr7102_firmware 1.00\(abyd.2\)c0
  • zyxel ex3510-b0_firmware 5.17\(abup.7\)c0
  • zyxel ex5510-b0_firmware 5.17\(abqx.7\)c0

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2y ago

Exploit prediction

0.75% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Zyxel NR7101 firmware

Classification

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

References

Sources

Fencer Intel 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.