No exploitation reportedFix available

CVE-2020-3200

No exploitation reported by the sources we read.

Published2020-06-03
WeaknessCWE-371 · CWE-436

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 Secure Shell (SSH) server code of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload. The vulnerability is due to an internal state not being represented correctly in the SSH state machine, which leads to an unexpected behavior. An attacker could exploit this vulnerability by creating an SSH connection to an affected device and using a specific traffic pattern that causes an error condition within that connection. A successful exploit could allow an attacker to cause the device to reload, resulting in a denial of service (DoS) condition.

Timeline

dates in UTC

2020-06-0318:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 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-2020-3200?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-3200?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

Branch	Affected	Fixed in	Source
12.2	= 12.2\(6\)i1	no fix published	NVD
12.2	= 12.2\(58\)ex	no fix published	NVD
12.2	= 12.2\(58\)ey	no fix published	NVD
12.2	= 12.2\(58\)ey1	no fix published	NVD
12.2	= 12.2\(58\)ey2	no fix published	NVD
12.2	= 12.2\(58\)ez	no fix published	NVD
12.2	= 12.2\(58\)se	no fix published	NVD
12.2	= 12.2\(58\)se1	no fix published	NVD
12.2	= 12.2\(58\)se2	no fix published	NVD
12.2	= 12.2\(60\)ez	no fix published	NVD
12.2	= 12.2\(60\)ez1	no fix published	NVD
12.2	= 12.2\(60\)ez2	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.comPatch · Vendor 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 3.17.7read 2026-10-23
CNACVSS 3.07.7read 2026-10-23
NVDCVSS 2.06.8read 2026-10-23
CNAweakness (CWE)CWE-371read 2026-10-23
NVDweakness (CWE)CWE-436read 2026-10-23
FIRST EPSSEPSS score1.7 %2026-10-23

Technical details

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

Frequently asked questions

What is CVE-2020-3200?

Is CVE-2020-3200 actively exploited?

Active exploitation of CVE-2020-3200 has not been confirmed. Its EPSS score was 1.7% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-3200?

CVE-2020-3200 has a CVSS v3 base score of 7.7 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.

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