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ArmorX Spam EUVDEUVD-2026-104815

| CVE-2026-113403 HIGH
Improper Neutralization of CRLF Sequences ('CRLF Injection') (CWE-93)
2026-10-20 twcert@cert.org.tw GHSA-pqfr-846f-jh32
7.1
CVSS 4.0 · Vendor: cert
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Attack ChainAIDerived

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

  1. Access
    Authenticate with valid low-priv account
  2. Delivery
    Submit crafted value in vulnerable parameter
  3. Exploit
    Inject OS command via unsanitized input
  4. Execution
    Upload/write malicious code to server
  5. Impact
    Achieve server-side code execution

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization CRLF sequence sanitization
Exploitation Conditions

Exploitation requires an authenticated session with at least low-privilege access to the ArmorX Spam application (CVSS PR:L), reachable over the network (AV:N) with no user interaction (UI:N) and low attack complexity (AC:L). The specific injectable parameter is not named in the available data and must be identified from the TWCERT advisory. The key limiting factor is the authentication requirement: an attacker must first obtain or be granted valid credentials, so exposure is driven by how broadly accounts are provisioned and whether the management interface is network-exposed. No special non-default configuration is indicated in the description.

Impact

This is a moderate-severity, authenticated command injection flaw (CVSS 4.0 base 7.1) in ArmorX Spam. The authoritative CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N) indicates network-reachable, low-complexity exploitation but requires low-level privileges (PR:L) - so the attacker must already hold a valid account on the appliance, which meaningfully narrows the attacker population versus an unauthenticated flaw. Impact is scoped to integrity only (VI:H), with no confidentiality or availability impact rated, consistent with the description's focus on uploading/injecting code rather than data theft or disruption - though in practice uploaded malicious code could be leveraged for broader compromise. No EPSS score, CISA KEV listing, or public POC is present in the provided data, so there is no evidence of active or imminent widespread exploitation; this should be treated as a patch-in-normal-cycle item rather than an emergency. One data note: the assigned CWE-93 (Improper Neutralization of CRLF Sequences) does not match the 'Command Injection' description and tag (which map to CWE-77/CWE-78) - verify the true weakness class with the vendor/TWCERT advisory.

Exploit ScenarioDerived

An attacker who already possesses valid (low-privilege) credentials to the ArmorX Spam management interface submits a crafted value in a specific parameter that is passed unsanitized to a system command, injecting attacker-controlled commands. This allows them to write/upload malicious code to the server, establishing a foothold for further action. No public exploit code is identified at time of analysis, so exploitation currently requires independent discovery of the vulnerable parameter.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.8% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 20, 2026

Authenticated command injection in ArmorX Spam allows remote users with low-privilege accounts to submit crafted parameter input and cause malicious code to be uploaded to the server, with the assessed impact concentrated on integrity rather than confidentiality or availability. The CVSS 4.0 base score is 7.1 and the aligned CVSS 3.1 assessment is AV:N/AC:L/PR:L/UI:N/C:N/I:H/A:N, reflecting network reachability, low attack complexity, low privileges, and no user interaction. No public exploit identified at time of analysis, and no CISA KEV or EPSS data was provided; exposure depends on how broadly authenticated accounts are provisioned and whether the vulnerable interface is network-accessible.

RemediationAI

No vendor-released patch or fixed version is identified in the supplied data at time of analysis, so confirm the current fixed release and update guidance from the TWCERT advisories at https://www.twcert.org.tw/en/cp-139-11295-f2efd-2.html and https://www.twcert.org.tw/tw/cp-132-11294-4e5d8-1.html, then apply the vendor update as soon as it is available. Until a patch is applied, restrict access to the ArmorX Spam management or upload interface to trusted networks and administrative users, accepting that this may block legitimate remote administration; enforce least privilege and remove unnecessary low-privilege accounts, with the trade-off of reduced operational convenience; disable or tightly constrain file-upload functionality if the business can tolerate the loss of that feature; and monitor web and application logs for crafted parameter payloads or unexpected uploads, recognizing that signature-based detection may miss alternate encodings. If a reverse proxy or WAF is available, use targeted virtual patching for the vulnerable parameter, but validate that it covers the advisory-specific input path and expect possible false positives.

Affected VersionsENISA

ArmorX Spam ArmorX Spam versions prior to 8.15.2-3.282.133-1.90.061

Affected Packages

euvd armorx_spam_armorx_spam_versions_prior_to no fix

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

ArmorX Spam is the affected application from ArmorX Global Technology, and the supplied advisory describes command injection through a specific parameter used in a server-side upload workflow. The root-cause class is improper neutralization of special elements in input: crafted parameter content is not safely handled before being used by the application, allowing an authenticated low-privilege attacker to influence server-side command execution or file placement. CWE-93 formally refers to CRLF sequence neutralization, while the supplied tag and description classify the issue as command injection; that classification discrepancy should be resolved against the TWCERT advisory, but in either case the practical weakness is insufficient input sanitization. The CVSS 4.0 vector confirms AV:N/AC:L/AT:N/PR:L/UI:N with VC:N/VI:H/VA:N and no subsequent-system impact, so the issue is remotely reachable by an authenticated user and primarily compromises integrity. The exact injectable parameter and affected release range are not named in the available data.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (cert) PRIMARY 7.1 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
vuln.today AI 6.5 MEDIUM

Network-reachable (AV:N), low complexity (AC:L), requires a valid low-privilege account (PR:L), no user interaction; impact limited to integrity (code upload) with no confidentiality or availability impact per the description.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (cert).

CVSS VectorVendor: cert

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

DescriptionCVE.org

ArmorX Spam developed by ArmorX Global Technology has a Command Injection vulnerability. Authenticated remote attackers can inject crafted commands into a specific parameter, thereby uploading malicious code to the server.

Executive ViewAI

Why It Matters

ArmorX Spam is affected by a high-severity authenticated command-injection vulnerability that could let low-privileged users upload malicious code and compromise the integrity of the email security service; no public exploit was identified at time of analysis, and no vendor-released patch was identified at time of analysis. Leadership should care because practical exposure depends on how broadly accounts are provisioned and whether the vulnerable interface is network-accessible, so containment currently relies on access restrictions, least privilege, and monitoring rather than a vendor fix.

Business Impact: Medium
Compensating Controls

No vendor-released patch identified at time of analysis; restrict network access to authenticated interfaces, enforce least privilege and review low-privilege accounts, monitor crafted parameter input and file uploads, apply WAF/IPS command-injection and upload filtering, segment ArmorX Spam, and maintain tested offline backups.

Threat Intelligence Overview

EPSS Score
0.8%
Top 43% exploitable
Prevalence
Low
regional Taiwanese email-security appliance, limited global enterprise footprint
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 HIGH
CISA KEV No
Public POC No
EPSS 0.8%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
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
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact
Medium
Technical Impact
Total

Priority Score

37
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +36
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

OS command injection occurs when an application passes unsanitized user input directly into system shell commands.

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