CVE-2026-76519
Cisco Secure Email Gateway Arbitrary File Write Vulnerability
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
Official description from the CVE record, published by cisco. Copyright © 1999-2026 The MITRE Corporation. See /security/cve/legal for the CVE license. View the record on cve.org
Key data
CVSS 3.1 Critical 9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector: Network
The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity: Low
No special conditions are needed. The attack can be repeated at will.
Privileges required: None
No account or privileges are needed.
User interaction: None
No action from any user is needed.
Scope: Unchanged
The impact stays within the vulnerable component.
Confidentiality impact: High
Serious or total effect on the secrecy of data.
Integrity impact: High
Serious or total effect on the trustworthiness of data.
Availability impact: High
Serious or total effect on availability.
| Metric | Value | What it means |
|---|---|---|
| Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. |
| Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. |
| Privileges required | None | No account or privileges are needed. |
| User interaction | None | No action from any user is needed. |
| Scope | Unchanged | The impact stays within the vulnerable component. |
| Confidentiality impact | High | Serious or total effect on the secrecy of data. |
| Integrity impact | High | Serious or total effect on the trustworthiness of data. |
| Availability impact | High | Serious or total effect on availability. |
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EPSS
- Score
- 0.06227 (6.2% probability)
- Percentile
- 93.6%
- Scores of
- Nov 10, 2026
- Model
- v2026.06.15
CISA Known Exploited Vulnerabilities
- Name in the catalog
- Cisco Secure Email Gateway Relative Path Traversal Vulnerability
- Added to the catalog
- Oct 14, 2026
- Federal due date
- Oct 17, 2026
CISA assessment as of Oct 14, 2026
- Exploitation
- Recorded by CISA as active
- Automatable
- yes
- Technical impact
- total
Weakness (CWE)
- CWE-23Relative Path Traversal
Affected products
Cisco Secure Email
- affected: 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
References
- cisco-sa-esa-afw-zqYJkjxp (sec.cloudapps.cisco.com)
Timeline
- ID reserved
- Added to CISA KEV
- Record published
- Record last updated
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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:37 UTC. Sources and licenses