CVE-2022-20783Network attack vector

Unauthenticated device reboot via malformed H.323 traffic

Published Apr 21, 2022 · Updated Nov 6, 2024

Improper input validation in Cisco RoomOS before January 2022 allows remote attackers to reboot devices through crafted H.323 traffic. The packet-processing path accepts malformed H.323 input without sufficient validation and triggers either a normal reboot or a reboot into maintenance mode. No authentication is required, but H.323 Mode must be enabled; the resulting reboot interrupts service, and maintenance mode prolongs the outage.

CVSS severity7.5
High
EPSS probability1.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Cisco RoomOS before January 2022 allows remote attackers to reboot devices through crafted H.323 traffic. The packet-processing path accepts malformed H.323 input without sufficient validation and triggers either a normal reboot or a reboot into maintenance mode. No authentication is required, but H.323 Mode must be enabled; the resulting reboot interrupts service, and maintenance mode prolongs the outage.

The record

CVE
CVE-2022-20783
Published
Apr 21, 2022
Updated
Nov 6, 2024
Vendor
ClamAV
Product
Cisco RoomOS
Classifications
CWE-1287, CWE-20, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 21, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco RoomOSversion=n/a

Published CVSS scores

7.5Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:X/RL:X/RC:X
7.8NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:C

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1287Improper Validation of Specified Type of Input
CWE-20Improper Input Validation
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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