CVE-2022-20717

Device crash via NETCONF memory exhaustion

Published Apr 15, 2022 · Updated Nov 6, 2024

Resource exhaustion in the NETCONF process of Cisco SD-WAN vEdge Router allows local users to crash an affected device. The process inadequately manages memory under large traffic volumes; Cisco has not identified the specific request or allocation path. Authenticated local access is required, and sustained malicious traffic exhausts memory and interrupts routing service.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in the NETCONF process of Cisco SD-WAN vEdge Router allows local users to crash an affected device. The process inadequately manages memory under large traffic volumes; Cisco has not identified the specific request or allocation path. Authenticated local access is required, and sustained malicious traffic exhausts memory and interrupts routing service.

The record

CVE
CVE-2022-20717
Published
Apr 15, 2022
Updated
Nov 6, 2024
Vendor
ClamAV
Product
Cisco SD-WAN vEdge Router
Classifications
CWE-789, CWE-770, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 15, 2022CVE publishedPublication date reported by the CVE source.
  2. Nov 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

ClamAV · Cisco SD-WAN vEdge Routerversion=n/a

Published CVSS scores

4.9NIST National Vulnerability DatabaseAV:L/AC:L/Au:N/C:N/I:N/A:C
5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Cisco Systems, Inc.CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-789Memory Allocation with Excessive Size Value
CWE-770Allocation of Resources Without Limits or Throttling
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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