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Fencer Intel
high 8.8

CVE-2025-13943 json

A post-authentication command injection vulnerability in the log file download function of the Zyxel EX3301-T0 firmware versions through 5.…

published 8mo ago modified 4mo ago also EUVD-2025-207550

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 75%
public exploits
0
none known

Summary

A post-authentication command injection vulnerability in the log file download function of the Zyxel EX3301-T0 firmware versions through 5.50(ABVY.7)C0 could allow an authenticated attacker to execute operating system (OS) commands on an affected device.

Patch / fix

  • zyxel ex5601-t1_firmware 5.70\(acdz.5.1\)c0
  • zyxel ex7501-b0_firmware 5.18\(achn.3.1\)c0
  • zyxel ex7710-b0_firmware 5.18\(acak.1.6\)c0
  • zyxel gm4100-b0_firmware 5.18\(accl.2\)c0
  • zyxel pm7500-00_firmware 5.61\(ackk.1.2\)c0
  • zyxel vmg3625-t50b_firmware 5.50\(abpm.9.7\)c0
  • zyxel vmg4005-b50a_firmware 5.17\(abqa.3.2\)c0
  • zyxel vmg4005-b60a_firmware 5.17\(abqa.3.2\)c0
  • zyxel ax7501-b1_firmware 5.17\(abpc.7.1\)c0
  • zyxel pe3301-00_firmware 5.63\(acmt.2.1\)c0
  • zyxel pe5301-01_firmware 5.63\(acoj.2.1\)c0
  • zyxel pm3100-t0_firmware 5.42\(acbf.4.1\)c0
  • zyxel pm5100-t0_firmware 5.42\(acbf.4.1\)c0
  • zyxel pm5100-t1_firmware 5.42\(acbf.4.1\)c0
  • zyxel pm7300-t0_firmware 5.42\(abyy.4.1\)c0
  • zyxel px3321-t1_firmware 5.44\(achk.3\)c0, 5.44\(acjb.1.5\)c0
  • zyxel px5301-t0_firmware 5.44\(ackb.0.6\)c0
  • zyxel vmg8623-t50b_firmware 5.50\(abpm.9.7\)c0
  • zyxel we3300-00_firmware 5.70\(acka.1.1\)c0
  • zyxel wx3100-t0_firmware 5.50\(abvl.4.9\)c0

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
8mo ago

Exploit prediction

1.54% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Zyxel EX3301-T0 firmware

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

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.