Is CVE-2026-4558 actively exploited?

No active exploitation of CVE-2026-4558 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-4558 be exploited remotely?

Yes. CVE-2026-4558 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-4558?

CVE-2026-4558 has a CVSS score of 8.8 (HIGH).

HOME VULNERABILITIESCVE-2026-4558

HIGH

CVE-2026-4558

CWE-77Published: March 22, 2026· Updated: Mar 23, 2026

8.8

CVSS v3.1

EPSS:0.15%probability of exploitation in 30 daysPercentile:35.7th

Official Description

A flaw has been found in Linksys MR9600 2.0.6.206937. Affected is the function smartConnectConfigure of the file SmartConnect.lua. Executing a manipulation of the argument configApSsid/configApPassphrase/srpLogin/srpPassword can lead to os command injection. The attack may be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

NVD Source

Technical Analysis

CVE-2026-4558 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

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News & Research Mentioning CVE-2026-4558

Microsoft Releases Mitigation for YellowKey BitLocker Bypass CVE-2026-45585 Exploit

The Hacker News· May 20, 2026

Microsoft on Tuesday released a mitigation for a BitLocker bypass vulnerability named YellowKey following its public disclosure last week. The zero-day flaw, now tracked as CVE-2026-45585, carries a CVSS score of 6.8. It has been described as a BitLocker security feature bypass. "Microsoft is aware of a security feature bypass vulnerability in Windows publicly referred to as 'YellowKey,'" the [xlite_meta score:59 src:The Hacker News xlite_fp:5983c4f8b2ca262bad5640474bb16433992e97ee370382605deefe43a11b2556]