What is CVE-2016-1438?

CVE-2016-1438 is a high-severity vulnerability in Cisco Asyncos, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2016-06-23.

How severe is CVE-2016-1438?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Cisco Asyncos

CVE-2016-1438

Cisco AsyncOS 9.7.0-125 on Email Security Appliance (ESA) devices allows remote attackers to bypass intended spam filtering via crafted executable content in a ZIP archive, aka Bug ID CSCuy39210.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2016-06-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.012 (68.2th percentile), scored 2026-10-21.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: +0.000

Affected products

Cisco Asyncos — versions 9.7.0-125
Cisco Email Security Appliance Firmware

Weakness classification (CWE)

References

www.securitytracker.com/id/1036156 (vdb-entry)
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160622… (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2016-1438?: CVE-2016-1438 is a high-severity vulnerability in Cisco Asyncos, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2016-06-23.
How severe is CVE-2016-1438?: High severity. CVSS v3 base score is 7.5 out of 10.