Is CVE-2016-6357 in the CISA KEV catalog?

No. CVE-2016-6357 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-6357?

CVE-2016-6357 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2016-6357?

CVE-2016-6357 has an EPSS score of 2.42% (82th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2016-6357?

No published fix for CVE-2016-6357 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2016-6357

HIGHEPSS 82th pctl

7.5

CVSS v3

NVD

Description

A vulnerability in the configured security policies, including drop email filtering, in Cisco AsyncOS for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass a configured drop filter by using an email with a corrupted attachment. More Information: CSCuz01651. Known Affected Releases: 10.0.9-015 9.7.1-066 9.9.6-026.

CWE-388

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

2.42%probability of exploitation in 30 days

82ndpercentile

Elevated risk: more likely to be exploited than 82% of all known CVEs.

References

Vendor Advisory1

tools.cisco.com

Other references2

Related Vulnerabilities

Other CWE-388 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2018-1002105	Critical	9.8	87%	-	Fix
CVE-2016-8745	High	7.5	16%	-	Fix
CVE-2018-0155	High	8.6	7.9%	KEV	-
CVE-2016-9778	High	7.5	6.8%	-	-
CVE-2014-9841	Critical	9.8	3.9%	-	Fix
CVE-2014-9826	Critical	9.8	3.7%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.