CVE-2023-1101Network attack vector

MFA bypass via excessive code attempts

Published Mar 2, 2023 · Updated Mar 7, 2025

Improper MFA attempt restriction in SonicWall SonicOS SSLVPN allows remote authenticated users to submit excessive MFA codes. The SSLVPN authentication flow fails to enforce an adequate attempt limit on MFA codes; SonicWall has not disclosed the responsible function or enforcement logic. A valid first-factor session is required, after which repeated MFA guesses can defeat the second-factor gate and grant the targeted VPN account's access.

CVSS severity8.8
High
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper MFA attempt restriction in SonicWall SonicOS SSLVPN allows remote authenticated users to submit excessive MFA codes. The SSLVPN authentication flow fails to enforce an adequate attempt limit on MFA codes; SonicWall has not disclosed the responsible function or enforcement logic. A valid first-factor session is required, after which repeated MFA guesses can defeat the second-factor gate and grant the targeted VPN account's access.

The record

CVE
CVE-2023-1101
Published
Mar 2, 2023
Updated
Mar 7, 2025
Vendor
SonicWall
Product
SonicOS
Classifications
CWE-307, CAPEC-49, T1110
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 7, 2025Record 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=SonicOS 6.5.4.11-97n and earlier
  2. Affected versionversion=SonicOS 7.0.1-5095 and earlier
  3. Affected versionversion=SonicOS NSsp 7.0.1-5083 and earlier
  4. Affected versionversion=SonicOS NSv 6.5.4.4-44v-21-1551 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SonicWall · SonicOSversion=SonicOS 6.5.4.11-97n and earlier; version=SonicOS 7.0.1-5095 and earlier; version=SonicOS NSsp 7.0.1-5083 and earlier; version=SonicOS NSv 6.5.4.4-44v-21-1551 and earlier

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-307Improper Restriction of Excessive Authentication Attempts
CAPEC-49Password Brute Forcing
T1110Brute Force

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo