CVE-2026-76008Network attack vector

Memory corruption via URI parameter overflow

Published Aug 19, 2026 · Updated Aug 19, 2026

Stack overflow in /cgi-bin/mbox-config in COMFAST CF-N1-S 2.6.0.1 allows remote attackers to corrupt memory via width or height parameters. The get_para_from_uri routine in the URI parameter parsing path does not adequately bound the width and height values before using stack memory, so oversized input can overwrite adjacent stack data. Reachability is remote and no authentication or user interaction is listed, but published records do not disclose a demonstrated code-execution path beyond memory corruption and likely service interruption.

CVSS severity10.0
Critical
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Stack overflow in /cgi-bin/mbox-config in COMFAST CF-N1-S 2.6.0.1 allows remote attackers to corrupt memory via width or height parameters. The get_para_from_uri routine in the URI parameter parsing path does not adequately bound the width and height values before using stack memory, so oversized input can overwrite adjacent stack data. Reachability is remote and no authentication or user interaction is listed, but published records do not disclose a demonstrated code-execution path beyond memory corruption and likely service interruption.

The record

CVE
CVE-2026-76008
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
COMFAST
Product
CF-N1-S
Classifications
CWE-121, CWE-119, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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=2.6.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

COMFAST · CF-N1-Sversion=2.6.0.1

Published CVSS scores

10.0VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X
10.0NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
10.0NVDAV:N/AC:L/Au:N/C:C/I:C/A:C
10.0VulDB CNACVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1190Exploit Public-Facing Application

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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