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CVE-2024-29976

MEDIUM
6.5
CVSS Score
Published: June 4, 2024 at 01:47 AM UTC
Updated: June 17, 2026 at 07:23 AM UTC
4 products affected across 1 vendorNAS326 firmwareNAS542 firmwareNas326

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Severity
MEDIUM6.5
Exploit prediction
EPSS 9%
SSVC
No known exploit

Description

** 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

NAS326 firmware· Zyxel
95%
v ≤ 5.21(aazf.16)c0v < 5.21(aazf.17)c0< V5.21(AAZF.17)C0
Affected range stops below 5.21(aazf.17)c0, so it looks safe — our inference, not a vendor statement
zyxel-nas326 (same device)
NAS542 firmware· Zyxel
95%
v ≤ 5.21(abag.13)c0v < 5.21(abag.14)c0< V5.21(ABAG.14)C0
Affected range stops below 5.21(abag.14)c0, so it looks safe — our inference, not a vendor statement
zyxel-nas542 (same device)
Nas326· Zyxeldevice
80%
All versions
Nas542· Zyxeldevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

ExploitThird Party Advisory
Source: [email protected]
https://outpost24.com/blog/zyxel-nas-critical-vulnerabilities/
Vendor Advisory
Source: [email protected]
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-nas-products-06-04-2024

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMZyxel
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-269NVD-CWE-noinfo

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