CVE-2016-6367 — Cisco Adaptive Security Appliance (ASA) CLI Remote Code Execution Vulnerability

In brief

Severity · CVSS: High7.8CVSS 3.1, High
EPSS: 23%
CISA KEV: Known exploited, listed since 24 May 2022
CERT-FR: No advisory or alert referenced in the catalog
Vendor: Cisco
Published · Modified: 18 Aug 2016 · 17 Jun 2026
Last verified: 1 Oct 2026 at 09:31 UTC

Summary

Cisco Adaptive Security Appliance (ASA) Software before 8.4(1) on ASA 5500, ASA 5500-X, PIX, and FWSM devices allows local users to gain privileges via invalid CLI commands, aka Bug ID CSCtu74257 or EPICBANANA.

Weakness: CWE-77

Title, description and the vendor's statements are quoted from the CVE record; a vendor's advisory is summarised in Patcharo's words, with a link.

Affected and fixed versions

Per product and release branch, as the vendor's CVE record and official advisory state them. A fixed release is shown only when a document names it: the vendor's, or CERT-FR's for Check Point, with its source.

No precise fixed release is published in the sources Patcharo follows.

Remediation

CISA required action

CISA KEV required action

Apply updates per vendor instructions.

CISA due date: 14 Jun 2022

SourceCISA KEV

Last verified 1 Oct 2026 at 09:31 UTC

Known exploitation

Added to CISA KEV on 24 May 2022

Federal remediation due date: 14 Jun 2022

The CISA required action is shown under Remediation.

23% probability of exploitation in the next 30 days (percentile 98%).

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

CERT-FR

No CERT-FR advisory or alert of the last two years references this CVE, for the vendors Patcharo covers.

Timeline

18 Aug 2016Published by the source
24 May 2022Added to CISA KEV
14 Jun 2022CISA remediation due date
17 Jun 2026Source record last modified
29 Sept 2026EPSS score computed
1 Oct 2026Last verified by Patcharo

Official sources

Cisco (CVE record)retrieved 1 Oct 2026 at 09:31 UTC
CISA Known Exploited Vulnerabilitiesretrieved 1 Oct 2026 at 09:28 UTC
NVDretrieved 27 Sept 2026 at 23:44 UTC
FIRST EPSSretrieved 30 Sept 2026 at 00:17 UTC

Known exploited

40271

References

https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/40271.zip

Cisco · CISA Known Exploited Vulnerabilities · NVD · FIRST EPSS

How Patcharo reads this

Affected and fixed releases come from the vendor's structured statements and are matched against exact versions; CVSS from NVD, exploitation from CISA KEV and the vendor's own advisory, probability from FIRST EPSS. Missing data stays Unknown and never becomes Not affected.

Read the methodology Read the guide: Cisco Secure Firewall release trains: Threat Defense, Management Center and ASA versions explained