HackZoneLabs News
Newsletter

CVE-2026-76519

Cisco Secure Email Gateway Arbitrary File Write Vulnerability

  • Critical 9.8
  • Exploited: added to CISA KEV 14 Oct 2026

Description

A vulnerability in the Advanced Malware Protection (AMP) feature of Cisco Secure Email Gateway could allow an unauthenticated, remote attacker to write arbitrary files on the underlying operating system. This vulnerability is due to improper handling of email attachments when the file reputation service is enabled. An attacker could exploit this vulnerability by sending an email that contains a crafted attachment through an affected device. A successful exploit could allow the attacker to write arbitrary files and execute commands with root privileges on the underlying operating system.

Key facts

Published
14 Oct 2026
Last changed
15 Oct 2026
Assigned by
cisco
KEV added
14 Oct 2026
KEV fix due
17 Oct 2026
EPSS
6.227% likely to be exploited in the next 30 days, higher than 93.648% of CVEs (scores for 15 Nov 2026)
SSVC (CISA)
Exploitation: active; Automatable: yes; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 9.8CVSS 3.1, Criticalfrom the CNA (cisco)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What to do

  • Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
CiscoCisco Secure Email
  • Default status: unknown
  • 14.0.0-698 (affected)
  • 13.5.1-277 (affected)
  • 13.0.0-392 (affected)
  • 14.2.0-620 (affected)
  • 13.0.5-007 (affected)
  • 13.5.4-038 (affected)
  • 14.2.1-020 (affected)
  • 14.3.0-032 (affected)
  • 15.0.0-104 (affected)
  • 15.0.1-030 (affected)
  • 15.5.0-048 (affected)
  • 15.5.1-055 (affected)
  • 15.5.2-018 (affected)
  • 16.0.0-050 (affected)
  • 15.0.3-002 (affected)
  • 16.0.0-054 (affected)
  • 15.5.3-022 (affected)
  • 16.0.1-017 (affected)
  • 15.5.4-012 (affected)
  • 16.0.4-016 (affected)
  • 15.0.5-016 (affected)
  • 16.0.2-112 (affected)
  • 16.0.3-044 (affected)

Timeline

  1. 14 Oct 2026 CVE-2026-76519 added to CISA KEV
  2. 14 Oct 2026 Added to the CISA KEV catalogue
  3. 14 Oct 2026 Published

Weakness

References