CVE-2016-6366

Q: How do I fix CVE-2016-6366?

Upgrade adaptive security appliance software to 9.6.1(11) or later.

Q: Is CVE-2016-6366 being actively exploited?

Yes. CVE-2016-6366 is listed in the CISA Known Exploited Vulnerabilities catalog, which means exploitation has been observed in the wild. US federal agencies were required to remediate it by 2022-06-14. Treat it as a priority whatever its CVSS score says.

Q: How severe is CVE-2016-6366?

CVE-2016-6366 has a CVSS v3 base score of 8.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2016-6366 affect?

Published advisories record a fix for adaptive security appliance software (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

HIGHCISA KEVEPSS 100th pctl

8.8

CVSS v3

NVD

Description

Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through 9.4.2.3 on ASA 5500, ASA 5500-X, ASA Services Module, ASA 1000V, ASAv, Firepower 9300 ASA Security Module, PIX, and FWSM devices allows remote authenticated users to execute arbitrary code via crafted IPv4 SNMP packets, aka Bug ID CSCva92151 or EXTRABACON.

CWE-120Classic Buffer Overflow

How to fix

Remediation Available

adaptive security appliance softwareNVD

Affected:>= 9.6.0, < 9.6.1(11)Fixed in:9.6.1(11)CVE-2016-6366derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

87.56%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Cisco Adaptive Security Appliance (ASA) SNMP Buffer Overflow Vulnerability

A buffer overflow vulnerability in the Simple Network Management Protocol (SNMP) code of Cisco ASA software could allow an attacker to cause a reload of the affected system or to remotely execute code.

Apply updates per vendor instructions.

Remediation due: 2022-06-14

References

Exploit3

Vendor Advisory2

Third-Party Advisory3

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-120 (Classic Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0195	Medium	6.8	100%	-	Fix
CVE-2017-7269	Critical	9.8	100%	KEV	-
CVE-2019-11043	High	8.7	99%	KEV + Ransom	Fix
CVE-2011-4862	High	10.0	95%	-	Fix
CVE-2007-5659	High	7.8	94%	KEV	Fix
CVE-2022-3786	High	7.5	92%	-	Fix

Common questions

How do I fix CVE-2016-6366?

Upgrade adaptive security appliance software to 9.6.1(11) or later.

Is CVE-2016-6366 being actively exploited?

Yes. CVE-2016-6366 is listed in the CISA Known Exploited Vulnerabilities catalog, which means exploitation has been observed in the wild. US federal agencies were required to remediate it by 2022-06-14. Treat it as a priority whatever its CVSS score says.

How severe is CVE-2016-6366?

CVE-2016-6366 has a CVSS v3 base score of 8.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2016-6366 affect?

Published advisories record a fix for adaptive security appliance software (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2016-6366

Markdown

[![CVE-2016-6366](https://tridentstack.com/cve/badge/CVE-2016-6366.svg)](https://tridentstack.com/cve/CVE-2016-6366)

HTML

<a href="https://tridentstack.com/cve/CVE-2016-6366"><img src="https://tridentstack.com/cve/badge/CVE-2016-6366.svg" alt="CVE-2016-6366"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

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 2026-04-22.