Security restrictions bypass in Cisco Email Security Appliance

Published: 2018-08-16
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-0419
Exploitation vector Network
Public exploit N/A
Vulnerable software
Cisco Email Security Appliance
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor Cisco Systems, Inc

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Security restrictions bypass

EUVDB-ID: #VU14432

Risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0419

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No


The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The vulnerability exists in certain attachment detection mechanisms of Cisco Email Security Appliances (ESA) due to improper detection of content within executable (EXE) files. A remote attacker can send a customized EXE file that is not recognized and blocked by the ESA., bypass the filtering functionality and send email messages that contain malicious executable files to unsuspecting users.


Install update from vendor's website.

Vulnerable software versions

Cisco Email Security Appliance: 10.0.0 203 - 11.0.0 264

External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.