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CVE-2022-45853· NVD / CVE Program· CNA Zyxel

The privilege escalation vulnerability in the Zyxel GS1900-8 firmware version V2.70(AAHH.3) and the GS1900-8HP firmware version V2.70(AAHI

The privilege escalation vulnerability in the Zyxel GS1900-8 firmware version V2.70(AAHH.3) and the GS1900-8HP firmware version V2.70(AAHI.3) could allow an authenticated, local attacker with administrator privileges to execute some system commands as 'root' on a vulnerable device via SSH.

MediumCVSS 6.7 · v3.1—No exploit No fix recorded
Published
May 30, 2023
Updated
Jun 17, 2026
EPSS
0.2% · 6th percentile
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Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
6.7
CNA · Zyxel
6.7
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
zyxelgs1900-8 firmware
zyxelgs1900-8
zyxelgs1900-8hp firmware
zyxelgs1900-8hp
zyxelgs1900-10hp firmware
zyxelgs1900-10hp
zyxelgs1900-16 firmware
zyxelgs1900-16
zyxelgs1900-24 firmware
zyxelgs1900-24
zyxelgs1900-24e firmware
zyxelgs1900-24e

and 8 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • zyxel gs1900-10hp firmware2.70(aazi.3)
  • zyxel gs1900-16 firmware2.70(aahj.3)
  • zyxel gs1900-24 firmware2.70(aahl.3)
  • zyxel gs1900-24e firmware2.70(aahk.3)
  • zyxel gs1900-24ep firmware2.70(abto.3)
  • zyxel gs1900-24hpv2 firmware2.70(abtp.3)
  • zyxel gs1900-48 firmware2.70(aahn.3)
  • zyxel gs1900-48hpv2 firmware2.70(abtq.3)
  • zyxel gs1900-8 firmware2.70(aahh.3)
  • zyxel gs1900-8hp firmware2.70(aahi.3)

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Zyxel). Independent of NVD's CPE analysis and usually ahead of it.

  • Zyxel GS1900-8 firmware

    • V2.70(AAHH.3)affected

  • Zyxel GS1900-8HP firmware

    • V2.70(AAHI.3)affected

Same product

zyxel: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-7273A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through 2.90(ABTQ.1)C0 could allow aKEV
    66This week
  • CVE-2019-15800An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0.
    40Plan
  • CVE-2019-15803An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0.
    36Monitor
  • CVE-2019-15799An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0.
    36Monitor
  • CVE-2021-35031A vulnerability in the TFTP client of Zyxel GS1900 series firmware, XGS1210 series firmware, and XGS1250 series firmware, which could allow
    32Monitor
  • CVE-2021-35032A vulnerability in the 'libsal.so' of the Zyxel GS1900 series firmware version 2.60 could allow an authenticated local user to execute arbit
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-269 · Improper Privilege Management

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Root cause

To simplify setup, a service account is granted broad, cluster-wide permissions. The principle of least privilege is skipped during installation.

The bug in code

The whole CWE-269 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

yaml
kind: ClusterRolerules:  - apiGroups: ["*"]    resources: ["*"]    verbs: ["*"]

Fixed

yaml
kind: Rolemetadata:  namespace: lodos-systemrules:  - apiGroups: ["apps"]    resources: ["deployments"]    verbs: ["get", "list", "update"]

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records