CVE-2022-20692Network attack vector

Authenticated device reload via NETCONF connection exhaustion

Published Apr 15, 2022 · Updated Nov 6, 2024

Resource exhaustion in Cisco IOS XE Software before 17.3.1 allows remote authenticated users to force a device reload through NETCONF over SSH. The NETCONF over SSH connection handler does not adequately bound simultaneous sessions, so a connection flood consumes device resources. The feature is disabled by default, and exploitation requires low-privileged credentials; the resulting reload interrupts the affected device's services.

CVSS severity7.7
High
EPSS probability1.15%
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 Cisco IOS XE Software before 17.3.1 allows remote authenticated users to force a device reload through NETCONF over SSH. The NETCONF over SSH connection handler does not adequately bound simultaneous sessions, so a connection flood consumes device resources. The feature is disabled by default, and exploitation requires low-privileged credentials; the resulting reload interrupts the affected device's services.

The record

CVE
CVE-2022-20692
Published
Apr 15, 2022
Updated
Nov 6, 2024
Vendor
ClamAV
Product
Cisco IOS XE Software
Classifications
CWE-400, T1499.002
Attack vector
network
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?

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  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Cisco IOS XE Softwareversion=n/a

Published CVSS scores

7.7CiscoCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.002Service Exhaustion Flood

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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