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PatchSiren cyber security CVE debrief

CVE-2026-49196 Acer CVE debrief

A command injection vulnerability exists in a Wi-Fi device blocking feature due to insufficient sanitization of MAC address input. An attacker with high privileges can inject and execute arbitrary shell commands by supplying a crafted MAC address. The vulnerability is rated HIGH severity with a CVSS score of 8.6. The affected vendor is identified as Acer based on reference domain evidence, though this attribution carries low confidence and requires review. The weakness is categorized as CWE-77 (Improper Neutralization of Special Elements used in a Command).

Vendor
Acer
Product
Predator Connect W6x
CVSS
HIGH 8.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-29
Original CVE updated
2026-05-29
Advisory published
2026-05-29
Advisory updated
2026-05-29

Who should care

Network administrators managing Wi-Fi infrastructure, security teams responsible for wireless network security, and organizations using affected Acer networking equipment should prioritize this vulnerability due to its HIGH severity and potential for complete system compromise.

Technical summary

The vulnerability stems from a failure to sanitize MAC address input in a Wi-Fi device blocking feature. Without proper neutralization of special characters, attacker-controlled input can be interpreted as shell commands. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no required user interaction (UI:N), and high impact to confidentiality, integrity, and availability (VC:H/VI:H/VA:H), with high privileges required (PR:H). The attack does not affect subsequent system confidentiality, integrity, or availability (SC:N/SI:N/SA:N). This is consistent with an authenticated administrator-level command injection in a network-accessible management interface.

Defensive priority

HIGH

Recommended defensive actions

  • Apply vendor-provided firmware or software updates when available from Acer
  • Restrict administrative access to Wi-Fi management interfaces to trusted personnel only
  • Implement input validation for MAC address fields, allowing only standard MAC address formats (e.g., six groups of two hexadecimal digits separated by colons or hyphens)
  • Deploy network segmentation to limit exposure of device management interfaces
  • Monitor logs for anomalous MAC address input patterns or unexpected shell command execution
  • Review and update secure coding practices to prevent command injection vulnerabilities (CWE-77)
  • Conduct security assessment of similar input fields across the product line for consistent sanitization

Evidence notes

CVE published 2026-05-29T09:16:17.743Z; modified 2026-05-29T14:46:09.837Z. NVD status: Awaiting Analysis. CVSS 4.0 vector: AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N. Weakness: CWE-77. Vendor attribution derived from reference domain candidate 'Acer' with low confidence; marked for review.

Official resources

2026-05-29