No exploitation reported

CVE-2020-3227

No exploitation reported by the sources we read.

Published2020-06-03
WeaknessCWE-264 · CWE-863

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A vulnerability in the authorization controls for the Cisco IOx application hosting infrastructure in Cisco IOS XE Software could allow an unauthenticated, remote attacker to execute Cisco IOx API commands without proper authorization. The vulnerability is due to incorrect handling of requests for authorization tokens. An attacker could exploit this vulnerability by using a crafted API call to request such a token. An exploit could allow the attacker to obtain an authorization token and execute any of the IOx API commands on an affected device.

Timeline

dates in UTC

2020-06-0318:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-3227?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-3227?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Cisco ios xe

Branch	Affected	Fixed in	Source
3.11	= 3.11.6e	no fix published	NVD
16.3	= 16.3.1	no fix published	NVD
16.3	= 16.3.1a	no fix published	NVD
16.3	= 16.3.2	no fix published	NVD
16.3	= 16.3.3	no fix published	NVD
16.3	= 16.3.4	no fix published	NVD
16.3	= 16.3.5	no fix published	NVD
16.3	= 16.3.5b	no fix published	NVD
16.3	= 16.3.6	no fix published	NVD
16.3	= 16.3.7	no fix published	NVD
16.3	= 16.3.8	no fix published	NVD
16.3	= 16.3.9	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

tools.cisco.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2024-11-15
OpenCVESSVC decisionnone—
NVDCVSS 3.19.8read 2026-10-23
CNACVSS 3.09.8read 2026-10-23
NVDCVSS 2.010read 2026-10-23
CNAweakness (CWE)CWE-264read 2026-10-23
NVDweakness (CWE)CWE-863read 2026-10-23
FIRST EPSSEPSS score3.5 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2020-06-03
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-3227?

Is CVE-2020-3227 actively exploited?

Active exploitation of CVE-2020-3227 has not been confirmed. Its EPSS score was 3.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-3227?

CVE-2020-3227 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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