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CVE-2023-35140

MEDIUM
5.5
CVSS Score
Published: November 7, 2023 at 01:44 AM UTC
Updated: June 17, 2026 at 06:04 AM UTC
20 products affected across 1 vendorGS1900-10HP firmwareGS1900-24 firmwareGS1900-8 Firmware

Using GS1900-24EP firmware by Zyxel?

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

The improper privilege management vulnerability in the Zyxel GS1900-24EP switch firmware version V2.70(ABTO.5) could allow an authenticated local user with read-only access to modify system settings on a vulnerable device.

Affected

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

GS1900-10HP firmware· Zyxel
95%
v ≤ 2.70(aazi.5)
zyxel-gs1900-10hp (same device)
GS1900-16 firmware· Zyxel
95%
v ≤ 2.70(aahj.5)
zyxel-gs1900-16 (same device)
GS1900-24 firmware· Zyxel
95%
v ≤ 2.70(aahl.5)
zyxel-gs1900-24 (same device)
GS1900-24E firmware· Zyxel
95%
v ≤ 2.70(aahk.5)
zyxel-gs1900-24e (same device)
GS1900-24EP firmware· Zyxel
95%
v ≤ 2.70(abto.5)2.70(ABTO.5)
zyxel-gs1900-24ep (same device)
GS1900-24HPv2 firmware· Zyxel
95%
v ≤ 2.70(abtp.5)
zyxel-gs1900-24hpv2 (same device)
GS1900-48 firmware· Zyxel
95%
v ≤ 2.70(aahn.5)
zyxel-gs1900-48 (same device)
GS1900-48HPv2 firmware· Zyxel
95%
v ≤ 2.70(abtq.5)
zyxel-gs1900-48hpv2 (same device)
GS1900-8 Firmware· Zyxel
95%
v ≤ 2.70(aahh.5)
zyxel-gs1900-8 (same device)
GS1900-8HP firmware· Zyxel
95%
v ≤ 2.70(aahi.5)
zyxel-gs1900-8hp (same device)

Remediation

No guide yet

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

Patch and advisory references

References (1)

Vendor AdvisoryNot Applicable
Source: [email protected]
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-improper-privilege-management-vulnerability-in-gs1900-series-switches

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

5.5MEDIUMZyxel
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-269

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