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Jetkvm CVE-2026-32295

| EUVDEUVD-2026-12608 CRITICAL
Improper Restriction of Excessive Authentication Attempts (CWE-307)
2026-03-17 cisa-cg
9.3
CVSS 4.0 · NVD
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Send repeated login requests
  2. Delivery
    Bypass missing rate limiting
  3. Exploit
    Guess valid credentials
  4. Execution
    Authenticate as administrator
  5. Impact
    Access KVM console

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Brute-force prevention, rate limiting
Exploitation Conditions

JetKVM versions before 0.5.4 with default configuration lacking login rate limiting. Network-accessible login interface required with no authentication bypass prerequisite.

Impact

The CVSS score of 7.5 (High) reflects a network-exploitable vulnerability with low attack complexity requiring no privileges or user interaction (AV:N/AC:L/PR:N/UI:N), though impact is limited to confidentiality (C:H/I:N/A:N). The attack vector allows remote exploitation over the network, and the low complexity means exploitation is straightforward once the device is network-accessible. Given that KVM devices are explicitly called out by Eclypsium as 'keys to your kingdom' hanging on the network, the real-world risk is substantial for organizations using these devices in production environments. The vulnerability enables credential compromise which can lead to complete infrastructure control beyond the initial confidentiality impact suggested by CVSS. CISA-CG involvement indicates government concern about this vulnerability class. With a patch available since version 0.5.4, organizations running older versions face immediate risk from automated scanning and credential stuffing attacks. The vulnerability is highly automatable, making it attractive for opportunistic attackers scanning for exposed KVM devices.

Exploit ScenarioDerived

An attacker discovers a JetKVM device exposed on the internet through network scanning tools like Shodan or direct reconnaissance. Using automated brute-force tools such as Hydra or custom scripts, the attacker launches a dictionary attack against the login interface, systematically trying common usernames and passwords without being throttled or blocked. After successfully guessing valid credentials (especially if default or weak passwords are in use), the attacker gains full KVM access to connected servers, allowing them to view screen output, control keyboard and mouse input, access BIOS settings, mount virtual media, and potentially deploy ransomware or establish persistent backdoors at the firmware level.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 17, 2026

JetKVM versions prior to 0.5.4 contain an authentication vulnerability that allows unlimited login attempts without rate limiting, enabling attackers to conduct brute-force attacks against user credentials. This affects KVM (Keyboard, Video, Mouse) over IP devices used for remote server management, potentially granting attackers administrative access to critical infrastructure. The vulnerability has been reported by CISA-CG and analyzed by security researchers at Eclypsium in their research on KVM device security risks.

RemediationAI

Upgrade JetKVM to version 0.5.4 or later immediately, as documented in the vendor release at https://github.com/jetkvm/kvm/releases/tag/release%2F0.5.4. Organizations should prioritize this update for any JetKVM devices exposed to untrusted networks or the internet. As an interim mitigation until patching is completed, restrict network access to JetKVM devices to trusted IP ranges using firewall rules or network segmentation, implement VPN-only access for remote management, and monitor authentication logs for signs of brute-force attempts (multiple failed login attempts from single sources). Consider implementing an external authentication proxy or reverse proxy with rate limiting capabilities in front of the device if immediate patching is not feasible. Given the critical nature of KVM device access, audit all JetKVM instances to ensure they are not directly exposed to the internet and verify strong credential policies are in place. Review the CISA CSAF advisory at https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-26-076-01.json for additional guidance.

Affected VersionsENISA

JetKVM 0 <0.5.4

Affected Packages

euvd jetkvm fix: 0.5.4

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

JetKVM is a KVM-over-IP solution that provides remote access to servers and infrastructure through network-connected hardware devices. The affected component is cpe:2.3:a:jetkvm:jetkvm, specifically the authentication mechanism in versions before 0.5.4. This vulnerability is classified as CWE-307 (Improper Restriction of Excessive Authentication Attempts), meaning the application fails to implement controls that prevent or throttle repeated login attempts. KVM devices are particularly sensitive as they provide direct console access equivalent to physical presence at a server, including BIOS/UEFI access and pre-boot environments. The absence of rate limiting on the login interface creates a fundamental authentication weakness that undermines the security model of these critical access control devices.

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Severity by source

NVD PRIMARY 9.3 CRITICAL
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vulnerable system: Confidentiality
High
Vulnerable system: Integrity
None
Vulnerable system: Availability
None
Subsequent system: Confidentiality
High
Subsequent system: Integrity
High
Subsequent system: Availability
High

Lifecycle Timeline

2
Patch released
Mar 17, 2026 - 20:30 nvd
Patch available
CVE Published
Mar 17, 2026 - 17:19 nvd
CRITICAL 9.3

DescriptionCVE.org

JetKVM before 0.5.4 does not rate limit login requests, enabling brute-force attempts to guess credentials.

Executive ViewAI

Why It Matters

JetKVM installations are vulnerable to brute-force credential attacks due to missing login rate limiting, potentially allowing unauthorized access to critical infrastructure management interfaces. This poses a direct risk to organizations using JetKVM for remote server management, as compromised credentials could grant attackers persistent access to physical hardware controls.

Business Impact: High
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.0%
Top 91% exploitable
Data Quality
6 sources
Confidence: High

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact
High

Priority Score

46
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +46
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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