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Fencer Vulns
medium 6.5

CVE-2024-29976 json

** UNSUPPORTED WHEN ASSIGNED ** The improper privilege management vulnerability in the command “show_allsessions” in Zyxel NAS326 firmware…

published 2024-06-04 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-26950

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
9.0%
EPSS 9.0% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

** UNSUPPORTED WHEN ASSIGNED ** The improper privilege management vulnerability in the command “show_allsessions” in Zyxel NAS326 firmware versions before V5.21(AAZF.17)C0 and NAS542 firmware versions before V5.21(ABAG.14)C0 could allow an authenticated attacker to obtain a logged-in administrator’s session information containing cookies on an affected device.

Patch / fix

  • zyxel nas326_firmware 5.21\(aazf.17\)c0
  • zyxel nas542_firmware 5.21\(abag.14\)c0

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

8.95% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • outpost24.com https://outpost24.com/blog/zyxel-nas-critical-vulnerabilities/ referenced PoC, tagged "exploit" by a source, unverified

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:H/I:N/A:N

Affected products

  • Zyxel NAS326 firmware
  • Zyxel NAS542 firmware
  • zyxel nas326_firmware
  • zyxel nas542_firmware

Classification

Weakness
  • CWE-269 Improper Privilege Management

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.