What is CVE-2026-101074?

CVE-2026-101074 is Netcore NR289-GE Authentication boa password-check stack-based overflow. The supplied enrichment data classifies it as Memory Corruption mapped to CWE-121 Stack-based Buffer Overflow; CWE-119 Improper Restriction of Operations within a Memory Buffer.

Which versions are affected?

Affected product and version evidence is listed in the product table above. Current public advisories should be checked for exact version scope before patch targeting is finalized.

Is there active exploitation?

Active exploitation is not confirmed from current sources for CVE-2026-101074. If exploitation is not confirmed from current sources, teams should document that status and continue monitoring KEV, vendor, and telemetry updates.

No. CVE-2026-101074 is not listed in CISA KEV in the supplied enrichment data. KEV status should be monitored because it can change after initial disclosure or after exploitation becomes publicly confirmed.

Is there a public exploit?

A public PoC is not confirmed from current sources for CVE-2026-101074. Public exploit or PoC availability should raise triage priority, especially for exposed or business-critical systems.

How can defenders detect it?

Start with web/proxy/WAF logs, application logs, network IDS/IPS where available. Look for vulnerability-class behavior, product errors, suspicious authentication events, exploit probes, and abnormal process activity based only on evidence that applies to the affected product.

How should teams prioritize it?

Prioritize CVE-2026-101074 using CVSS 9.8, EPSS 0%, KEV status, public PoC status, and asset exposure. Internet-facing, privileged, or business-critical deployments should be handled first.

Are workarounds available?

The supplied mitigation guidance says to apply vendor patches and restrict external exposure until fixed. Fixed-version evidence is listed in the mitigation section above.

Which threat actors are linked publicly?

No public threat actor linkage is confirmed from current sources. Do not attribute exploitation to a threat actor unless the source evidence explicitly supports that linkage.

What should be done in the next 24 hours?

Identify exposed assets running affected vendor/product/version combinations. Prioritize based on EPSS, PoC availability, and external exposure. Search available logs for exploit probes, errors, authentication anomalies, or suspicious child processes matching the vulnerability class. Open remediation tickets with affected assets, owners, evidence status, and detection coverage so decisions are traceable.

criticalMemory Corruption

CVE-2026-101074

CVE-2026-101074 — Netcore NR289-GE Authentication boa password-check stack-based overflow

A weakness has been identified in Netcore NR289-GE 1.4.5102. The affected element is the function password-check of the file /bin/boa of the component Authentication. Executing a manipulation of the argument Username can lead to stack-based buffer overflow. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Published Sep 28, 2026Updated Sep 28, 2026Sources: NVD, Netcore (CNA), GitHub, GitHub Security Advisory

Triage

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

Exploitation

Unreported

no source claims exploitation

EPSS

Not scored

FIRST has not published a score

Affects

Netcore

NR289-GE

CVSS base

9.8

critical · 6 sources

Remediation

The vendor's own words where we have them.

Upgrade NR289-GE to a fixed release. Apply vendor patches per advisory and restrict external exposure of the affected component until patched.

First 24 hours

Ordered from the record's own fields — exposure first, because you cannot patch what you have not found.

Identify exposed assets running affected vendor/product/version combinations.
Prioritize based on EPSS, PoC availability, and external exposure.
Search available logs for exploit probes, errors, authentication anomalies, or suspicious child processes matching the vulnerability class.

Affected scope

Vendor, product and version as the advisories word them.

Vendor	Product	Versions	Status
Netcore	NR289-GE	1.4.5102	Vulnerable

Attack characteristics

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

Availability

High

Confidentiality

High

Integrity

High

Scope

Unchanged

Attack Complexity

Low

Attack Vector

Network

Privileges Req

None

User Interaction

None

Every base score collected

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

Score	Version	Severity	Expl.	Impact	Source
9.8	CVSS 3.1	critical	3.9	5.9	vuldb.com (CNA), GHSA
10	CVSS 2.0	high	10	10	vuldb.com (CNA)
9.3	CVSS 4.0	critical	—	—	Netcore (CNA)
9.8	CVSS 3.1	critical	—	—	Netcore (CNA)
9.8	CVSS 3.0	critical	—	—	Netcore (CNA)
10	CVSS 2.0	critical	—	—	Netcore (CNA)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness & attack patterns

CWE-121Stack-based Buffer Overflow
CWE-119Improper Restriction of Operations within a Memory Buffer

Inferred from the weakness class — not observed against this CVE.

CAPEC-100 · Overflow BuffersCAPEC-123 · Buffer Manipulation

Detection

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

Search application, proxy, and WAF logs for requests touching /bin/boa.
Prioritize edge telemetry for network-reachable NR289-GE.

web/proxy/WAF logsapplication logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first — with the readings a source repeats on a schedule counted underneath rather than listed.

2026
Added · CVSS 3.1 9.8 (AV:N)
Sep 28, 2026 · NVD
Initial · CVE published
Sep 28, 2026 · NVD
Added · GHSA-89wp-g8p9-x5r7 published (high)
Sep 28, 2026 · GitHub Security Advisory
Reported · Advisory disclosed
Sep 27, 2026 · Netcore
Reported · VulDB entry created
Sep 27, 2026 · Netcore
Reported · VulDB entry last update
Sep 27, 2026 · Netcore

References

7 on the record

github.com/senxitoyshuyi-ui/HACKALL/blob/main/netcore_NR289-GE_V1.4.5102%2C2018.06.1418_44%20Router/Netcore_NR289-GE_boa_stack_overflow.md
Exploit, Third Party Advisory
vuldb.com/cve/CVE-2026-101074
Vendor Advisory
vuldb.com/submit/929202
Vendor Advisory
vuldb.com/vuln/410945
Vendor Advisory
vuldb.com/vuln/410945/cti
Vendor Advisory
nvd.nist.gov/vuln/detail/CVE-2026-101074
NVD
github.com/advisories/GHSA-89wp-g8p9-x5r7
Exploit, Third Party Advisory

Elsewhere on this site

Netcoreevery CVE for this vendor
Memory Corruptionsame class
CWE-121other pages naming this weakness

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 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 record1

What should defenders know first?

CVE-2026-101074 is Netcore NR289-GE Authentication boa password-check stack-based overflow, a critical vulnerability affecting NR289-GE from Netcore. The current evidence does not list it in CISA KEV, and the exploit status is: Active exploitation is not confirmed from current sources for CVE-2026-101074. Public exploit evidence is: A public PoC is not confirmed from current sources for CVE-2026-101074. The affected-version evidence is listed in the key facts and affected products tables. Defenders should first verify whether exposed or business-critical assets run those versions, then apply vendor patches or mitigations, restrict reachable attack surface, and preserve logs for detection review. CVSS 9.8 describes technical severity, while EPSS 0% helps estimate near-term exploit likelihood; neither replaces asset context. Unknown fields should remain explicit in tickets, and threat actor, IOC, victimology, or payload claims should not be added unless a cited source supports them. Monitor CISA KEV, vendor advisories, NVD changes, public PoC repositories, and internal telemetry for update triggers.