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No exploitation reportedFix available

CVE-2020-3217

No exploitation reported by the sources we read.

  • Published2020-06-03
  • WeaknessCWE-20

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 Topology Discovery Service of Cisco One Platform Kit (onePK) in Cisco IOS Software, Cisco IOS XE Software, Cisco IOS XR Software, and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient length restrictions when the onePK Topology Discovery Service parses Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol message to an affected device. An exploit could allow the attacker to cause a stack overflow, which could allow the attacker to execute arbitrary code with administrative privileges, or to cause a process crash, which could result in a reload of the device and cause a DoS condition.

Timeline

dates in UTC
  1. 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-2020-3217?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-3217?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
BranchAffectedFixed in
12.2= 12.2\(6\)i1no fix published
12.4= 12.4\(25e\)jao7no fix published
15.0= 15.0\(2\)sg11ano fix published
15.1= 15.1\(3\)svr1no fix published
15.2= 15.2\(1\)syno fix published
15.2= 15.2\(1\)sy0ano fix published
15.2= 15.2\(1\)sy1no fix published
15.2= 15.2\(1\)sy1ano fix published
15.2= 15.2\(1\)sy2no fix published
15.2= 15.2\(1\)sy3no fix published
15.2= 15.2\(1\)sy4no fix published
15.2= 15.2\(1\)sy5no fix published
Cisco ios xe
BranchAffectedFixed in
3.7= 3.7.0eno fix published
3.7= 3.7.1eno fix published
3.7= 3.7.2eno fix published
3.7= 3.7.3eno fix published
3.7= 3.7.4eno fix published
3.7= 3.7.5eno fix published
3.8= 3.8.0eno fix published
3.8= 3.8.1eno fix published
3.8= 3.8.2eno fix published
3.8= 3.8.3eno fix published
3.8= 3.8.4eno fix published
3.8= 3.8.5aeno fix published
Cisco nx-osversion to verify
BranchAffectedFixed in
6.0= 6.0\(2\)ano fix published
6.0= 6.0\(2\)a4\(1\)no fix published
6.0= 6.0\(2\)a4\(2\)no fix published
6.0= 6.0\(2\)a4\(3\)no fix published
6.0= 6.0\(2\)a4\(4\)no fix published
6.0= 6.0\(2\)a4\(5\)no fix published
6.0= 6.0\(2\)a4\(6\)no fix published
6.0= 6.0\(2\)a6\(1\)no fix published
6.0= 6.0\(2\)a6\(1a\)no fix published
6.0= 6.0\(2\)a6\(2\)no fix published
6.0= 6.0\(2\)a6\(2a\)no fix published
6.0= 6.0\(2\)a6\(3\)no fix published

1 more product in the sources.

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

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionnone2024-11-15
  • OpenCVESSVC decisionnone—
  • NVDCVSS 3.18.8read 2026-10-23
  • CNACVSS 3.08.8read 2026-10-23
  • NVDCVSS 2.08.3read 2026-10-23
  • CNAweakness (CWE)CWE-20read 2026-10-23
  • NVDweakness (CWE)CWE-20read 2026-10-23
  • FIRST EPSSEPSS score1.1 %2026-10-23

Technical details

CVSS v3 Vector
CVSS:3.1/AV:A/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-2020-3217?

A vulnerability in the Topology Discovery Service of Cisco One Platform Kit (onePK) in Cisco IOS Software, Cisco IOS XE Software, Cisco IOS XR Software, and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient length restrictions when the onePK Topology Discovery Service parses Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol message to an affected device. An exploit could allow the attacker to cause a stack overflow, which could allow the attacker to execute arbitrary code with administrative privileges, or to cause a process crash, which could result in a reload of the device and cause a DoS condition.

Is CVE-2020-3217 actively exploited?

Active exploitation of CVE-2020-3217 has not been confirmed. Its EPSS score was 1.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-3217?

CVE-2020-3217 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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