CVE-2026-76853

Restore restriction bypass via flawed archive prefix check

Published Sep 15, 2026 · Updated Sep 15, 2026

Security check bypass in Netcore NR268 firmware 1.7.121109 allows attackers to evade restore-archive restrictions via a crafted upload. The parame_put_file.cgi handler in put_parame_file_cgi.c applies a flawed prefix check, so crafted archive paths pass restricted restore handling. Reaching the restore interface and submitting an archive are required; the public record does not specify authentication or the resulting file-system impact.

CVSS severityUnavailable
Unscored
EPSS probability0.22%
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

Security check bypass in Netcore NR268 firmware 1.7.121109 allows attackers to evade restore-archive restrictions via a crafted upload. The parame_put_file.cgi handler in put_parame_file_cgi.c applies a flawed prefix check, so crafted archive paths pass restricted restore handling. Reaching the restore interface and submitting an archive are required; the public record does not specify authentication or the resulting file-system impact.

The record

CVE
CVE-2026-76853
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Netcore
Product
NR268
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 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?

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  1. Affected versionversion=1.7.121109

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Netcore · NR268version=1.7.121109

Published CVSS scores

No CVSS assessment is available in this record.

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.

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No observations available

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

Weakness, pattern, technique

No sourced classifications are available.

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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