How severe is CVE-2016-1438?

CVE-2016-1438 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2016-1438 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-1438?

CVE-2016-1438 affects Cisco Asyncos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-1438?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-1438 published?

CVE-2016-1438 was published on 2016-06-23 and last updated on 2026-06-17.

CVE-2016-1438

CVE-2016-1438 is a high-severity vulnerability in Cisco Asyncos with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Asyncos
Published: 2016-06-23
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2016-1438?: CVE-2016-1438 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2016-1438 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-1438?: CVE-2016-1438 affects Cisco Asyncos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-1438?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-1438 published?: CVE-2016-1438 was published on 2016-06-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:cisco:asyncos:9.7.0-125:*:*:*:*:*:*:*

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