Live › vulnerability › CVE-2026-76519
Go to dashboardCisco Secure Email Gateway (physical and virtual) AMP feature mishandles email attachments when File Reputation is enabled; an unauthenticated attacker sending a crafted attachment can write arbitrary files and run commands as root. Cisco PSIRT confirms active exploitation (October 2026). Not affected: Secure Email and Web Manager, Secure Web Appliance. No workarounds.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 5h before NVD. All times on this page are UTC.
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.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Cisco Secure Email Gateway | vendor | – | – |
| Cisco Secure Email Gateway (AsyncOS) | vendor | AsyncOS 15.5 before 15.5.5-014; 16.0 all; 16.5 before 16.5.0-780; with File Reputation enabled and Content Scanner Tools < 25.3.0.5525 | 15.5.5-014, 16.5.0-780, Content Scanner Tools 25.3.0.5525 |
| cisco asyncos | vendor | >= 15.0, < 15.5.5-014 | 15.5.5-014 |
| cisco asyncos |
| vendor |
| >= 16.0, < 16.5.0-780 |
| 16.5.0-780 |
25.3.0.5525 (CLI: contentscannerstatus) and (2) Enable File Reputation is checked on a mail policy (Mail Policies > Incoming/Outgoing Mail Policies > Advanced Malware Protection)Suspected compromise indicator was found means compromised25.3.0.5525 or later (CLI: contentscannerupdate, or enable automatic updates under Security Services > Service Updates); no upgrade or restart needed15.5.5-014, 16.5 -> 16.5.0-780, 16.0 -> migrate to a fixed release (Cisco recommends 16.5.0-780)Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
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Cisco Secure Email Gateway contains a relative path traversal vulnerability that could allow an unauthenticated, remote attacker to write arbitrary files on the underlying operating system.
CISA required action: 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.
This page as .md · .json · in your agent: get_signal("CVE-2026-76519")
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