CVE-2022-35843Network attack vector

Unauthenticated SSH access via crafted RADIUS challenge

Published Dec 6, 2022 · Updated Oct 23, 2024

Authentication bypass in affected Fortinet FortiOS and FortiProxy releases allows remote attackers to obtain unauthorized SSH access. The SSH login component treats attacker-controlled fields in a crafted RADIUS Access-Challenge response as immutable authentication data. Exploitation requires SSH to use RADIUS authentication and the crafted response to come from the configured RADIUS server; a successful login grants the account's assigned device privileges.

CVSS severity9.8
Critical
EPSS probability0.91%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in affected Fortinet FortiOS and FortiProxy releases allows remote attackers to obtain unauthorized SSH access. The SSH login component treats attacker-controlled fields in a crafted RADIUS Access-Challenge response as immutable authentication data. Exploitation requires SSH to use RADIUS authentication and the crafted response to come from the configured RADIUS server; a successful login grants the account's assigned device privileges.

The record

CVE
CVE-2022-35843
Published
Dec 6, 2022
Updated
Oct 23, 2024
Vendor
Fortinet
Product
FortiOS
Classifications
CWE-284, CWE-302, T1133
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 6, 2022CVE publishedPublication date reported by the CVE source.
  2. Oct 23, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=6.0.0 <6.0.*
  2. Affected versionversion=6.0.0 <=6.0.15
  3. Affected versionversion=6.2.0 <6.2.*
  4. Affected versionversion=6.2.0 <=6.2.12
  5. Affected versionversion=6.4.0 <=6.4.9
  6. Affected versionversion=7.0.0 <=7.0.6
  7. Affected versionversion=7.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fortinet · FortiOSversion=6.0.0 <6.0.*; version=6.0.0 <=6.0.15; version=6.2.0 <6.2.*; version=6.2.0 <=6.2.12; version=6.4.0 <=6.4.9; version=7.0.0 <=7.0.6; version=7.2.0
Fortinet · FortiProxyversion=1.2.0 <=1.2.13; version=2.0.0 <=2.0.10; version=7.0.0 <=7.0.5

Published CVSS scores

7.7FortinetCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C
9.8National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

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-284Improper Access Control
CWE-302Authentication Bypass by Assumed-Immutable Data
T1133External Remote Services

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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