Medium

CVE-2026-18584 — GL.iNet E5800/E750/X2000/X3000/XE3000/XE300 eSIM LPA API v1 improper authorization

A security vulnerability has been detected in GL.iNet E5800, E750, X2000, X3000, XE3000 and XE300 up to 20260707. Impacted is an unknown function of the file /sdk/v1 of the component eSIM LPA API. Such manipulation leads to improper authorization. The attack can only be initiated within the local network. The vendor was contacted early about this disclosure and confirmed the existence of the vulnerability.

Published Aug 3, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: VulDB

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

Technical severity (medium)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

—

No EPSS score.

Affects

GL.iNet

E5800 and 5 more

CVSS base

5.4

Medium · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (GL.iNet E5800, GL.iNet E750, GL.iNet X2000…).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
GL.iNet	E5800	version 20260707	Vulnerable	CVE Program (cve.org) e CISA ADP
GL.iNet	E750	version 20260707	Vulnerable	CVE Program (cve.org) e CISA ADP
GL.iNet	X2000	version 20260707	Vulnerable	CVE Program (cve.org) e CISA ADP
GL.iNet	X3000	version 20260707	Vulnerable	CVE Program (cve.org) e CISA ADP
GL.iNet	XE300	version 20260707	Vulnerable	CVE Program (cve.org) e CISA ADP
GL.iNet	XE3000	version 20260707	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Adjacent

Attack complexity

Low

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
5.3	CVSS 4.0	Medium	—	—	cna@vuldb.com via NIST National Vulnerability Database
5.3	CVSS 4.0	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP
5.4	CVSS 3.1	Medium	2.8	2.5	cna@vuldb.com via NIST National Vulnerability Database
5.4	CVSS 3.1	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP
5.4	CVSS 3.0	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP
4.8	CVSS 2.0	Medium	6.5	4.9	cna@vuldb.com via NIST National Vulnerability Database
4.8	CVSS 2.0	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L (score shown at the top: cna@vuldb.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-266

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Affected products added · gl.inet/e5800, gl.inet/e750, gl.inet/x2000, gl.inet/x3000, gl.inet/xe3000, gl.inet/xe300
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
CVSS changed · 5.4
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Deferred
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Aug 3, 2026 · VulDB

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

5 on the record

vuldb.com/submit/849283
third-party-advisory, NIST National Vulnerability Database
vuldb.com/vuln/385413
vdb-entry, NIST National Vulnerability Database
vuldb.com/vuln/385413/cti
signature, permissions-required, NIST National Vulnerability Database
github.com/gl-inet/CVE-issues/blob/main/4.0.0/Unauthenticated%20access%20to%20eS
related, NIST National Vulnerability Database
vuldb.com/cve/CVE-2026-18584
third-party-advisory, NIST National Vulnerability Database

Elsewhere on this site

GL.iNet
every CVE for this vendor

CWE-266
other pages naming this weakness

Related CVEs (same products)

High CVE-2026-19983 GL.iNet XE3000 NAS Command Service gl_nas_sys os command injection Aug 17, 2026
High CVE-2026-19980 GL.iNet XE3000 Language Update ui.update_langs code injection Aug 17, 2026
High CVE-2026-19981 GL.iNet XE3000 Wi-Fi Timer Power-Schedule Feature os command injection Aug 17, 2026
High CVE-2026-19979 GL.iNet XE3000 WebDAV Service MOVE authorization Aug 17, 2026
Medium CVE-2026-18585 GL.iNet MT2500 APPS-NAS nas-web.get_file_list heap-based overflow Aug 3, 2026
Medium CVE-2026-11505 GL.iNet XE3000 glnassys hard-coded key Jun 8, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No FIRST EPSS score.
No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-18584 is "GL.iNet E5800/E750/X2000/X3000/XE3000/XE300 eSIM LPA API v1 improper authorization", rated Medium. It affects E5800 (GL.iNet); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.4 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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