CVE-2026-76865Network attack vector

Service crash via unchecked QoS parameter conversion

Published Sep 15, 2026 · Updated Sep 15, 2026

NULL pointer dereference in Netcore NR255-V 1.5.130703 allows remote attackers to crash the router via crafted QoS requests. The filter_conn_del_cgi.c and gre_prio_set_cgi.c QoS setter handlers process attacker-controlled values with atoi() without validating the conversion results, leading to a NULL pointer dereference. The public record does not state whether the management interface requires authentication; successful exploitation interrupts routing service.

CVSS severityUnavailable
Unscored
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Netcore NR255-V 1.5.130703 allows remote attackers to crash the router via crafted QoS requests. The filter_conn_del_cgi.c and gre_prio_set_cgi.c QoS setter handlers process attacker-controlled values with atoi() without validating the conversion results, leading to a NULL pointer dereference. The public record does not state whether the management interface requires authentication; successful exploitation interrupts routing service.

The record

CVE
CVE-2026-76865
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Netcore
Product
NR255-V
Classifications
T1499.004
Attack vector
network
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=1.5.130703

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Netcore · NR255-Vversion=1.5.130703

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

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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