CVE-2026-76519 Exploited in the wild
Cisco Secure Email Gateway Relative Path Traversal Vulnerability
- Risk score
- 100/100
- CVSS
- 9.8 v3.1
- Exploit chance (30 days)
- 1.6%
- Published
- 14 Oct 2026
- Added to CISA's exploited list
- 14 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- A vulnerability in Cisco Secure Email Gateway's AMP feature allows an attacker to write arbitrary files on the underlying OS, potentially executing commands with root privileges. An attacker could exploit this by sending a crafted email attachment through an affected device.
- Affected
- {'product': 'Cisco Secure Email Gateway', 'package': 'AMP feature', 'version': 'all versions'}
- Fix
- Apply mitigations in accordance with vendor instructions
- Exploitation
- Exploited in the wild
Story map
At a glance
Cisco Secure Email Gateway: Red, act today. A vulnerability in Cisco Secure Email Gateway's AMP feature allows an attacker to write arbitrary files on the underlying OS, potentially executing commands with root privileges. An attacker could exploit this by sending a crafted email attachment through an affected device.
The flaws
- CVE-2026-76519: Cisco Secure Email Gateway Relative Path Traversal Vulnerability (CVSS 9.8 · EPSS 2% · exploited)
- CVE-2026-76461: Cisco Secure Email Gateway SQL Injection Vulnerability (exploited)
The fix
Fix: Apply mitigations in accordance with vendor instructions
Who is exposed: {'product': 'Cisco Secure Email Gateway', 'package': 'AMP feature', 'version': 'all versions'}
Where it stands
- Exploited in the wild
- On CISA's exploited list since 14 Sep
- US federal deadline 17 Sep
How it unfolded
- 14 Sep, CISA (official): Added to the Known Exploited Vulnerabilities list (2 of these flaws)
- 17 Sep, Deadline (official): US federal agencies must have patched
Connects to
- Same weakness: Path traversal (CWE-23). 26 other warnings in 30 days
Why it is Red
- CVSS 9.8 critical
- Exploited in the wild (CISA KEV)
- Remotely exploitable without logging in
- On your watchlist: cisco
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.
References
Original 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.
Last activity 14 Oct 2026. Patch Forecast updates every hour.