CVE-2026-18585Network attack vector

Authenticated NAS service crash via oversized directory response

Published Aug 3, 2026 · Updated Aug 3, 2026

Heap-based buffer overflow in APPS-NAS on GL.iNet routers 20260707 allows remote authenticated users to crash NAS file browsing. The nas-web.get_file_list callback receives a backend directory-listing response in a fixed 16KB heap buffer and writes past its boundary when the body exceeds that size. A valid OUI session or trusted RPC access is required; triggering the flaw crashes the glc or NAS RPC process and interrupts only the NAS file-browsing interface.

CVSS severity5.3
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in APPS-NAS on GL.iNet routers 20260707 allows remote authenticated users to crash NAS file browsing. The nas-web.get_file_list callback receives a backend directory-listing response in a fixed 16KB heap buffer and writes past its boundary when the body exceeds that size. A valid OUI session or trusted RPC access is required; triggering the flaw crashes the glc or NAS RPC process and interrupts only the NAS file-browsing interface.

The record

CVE
CVE-2026-18585
Published
Aug 3, 2026
Updated
Aug 3, 2026
Vendor
GL.iNet
Product
X3000
Classifications
CWE-119, CWE-122, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=20260707

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GL.iNet · X3000version=20260707
GL.iNet · MT6000version=20260707
GL.iNet · MT3600BEversion=20260707
GL.iNet · XE3000version=20260707
GL.iNet · BE6500version=20260707
GL.iNet · MT2500version=20260707
GL.iNet · MT5000version=20260707
GL.iNet · MT3000version=20260707
GL.iNet · E5800version=20260707
GL.iNet · BE3600version=20260707
GL.iNet · BE9300version=20260707

Published CVSS scores

4.0NVDAV:N/AC:L/Au:S/C:N/I:N/A:P
5.3VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X
4.3NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-122Heap-based Buffer Overflow
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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