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CVE-2026-19868

An authentication enforcement vulnerability in SonicOS SSLVPN service may allow a user with valid credentials for an alternate authentication method to bypass SAML authentication controls. Successful exploitation may also bypass SAML-enforced multi-factor authentication (MFA).

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Listed
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Nsa 2700 Nsa 2800 Nsa 3700 and 36 more
CVE-2023-39280

SonicOS p ost-authentication Stack-Based Buffer Overflow vulnerability in the ssoStats-s.xml, ssoStats-s.wri URL endpoints leads to a firewall crash.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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Nsa2700 Nsa3700 Nsa4700 and 58 more
CVE-2024-40764

Heap-based buffer overflow vulnerability in the SonicOS IPSec VPN allows an unauthenticated remote attacker to cause Denial of Service (DoS).

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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Nsa 2700 Nsa 3700 Nsa 4700 and 29 more
CVE-2026-0400

Post-Authentication Format String Vulnerability Leading to Firewall Crash

A post-authentication Format String vulnerability in SonicOS allows a remote attacker to crash a firewall.

CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed
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Nsa 2700 Nsa 2800 Nsa 3700 and 30 more
CVE-2026-0402

Post-Authentication Out-of-Bounds Read Leading to Firewall Crash

A post-authentication Out-of-bounds Read vulnerability in SonicOS allows a remote attacker to crash a firewall.

CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed
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Nsa 2700 Nsa 2800 Nsa 3700 and 30 more
CVE-2026-3439

SonicOS Certificate Handling Buffer Overflow Enables Firewall Crash

A post-authentication Stack-based Buffer Overflow vulnerability in SonicOS certificate handling allows a remote attacker to crash a firewall.

CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed
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Nsa 2700 Nsa 2800 Nsa 3700 and 30 more
CVE-2025-40601

A Stack-based buffer overflow vulnerability in the SonicOS SSLVPN service allows a remote unauthenticated attacker to cause Denial of Service (DoS), which could cause an impacted firewall to crash.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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Nsa 2700 Nsa 2800 Nsa 3700 and 30 more
CVE-2025-40600

Use of Externally-Controlled Format String vulnerability in the SonicOS SSL VPN interface allows a remote unauthenticated attacker to cause service disruption.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
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Nsa 2700 Nsa 3700 Nsa 4700 and 20 more
CVE-2023-41711

SonicOS post-authentication Stack-Based Buffer Overflow Vulnerability in the sonicwall.exp, prefs.exp URL endpoints lead to a firewall crash.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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Nsa2700 Nsa3700 Nsa4700 and 58 more
CVE-2026-0399

Authenticated Stack‑Based Buffer Overflow in SonicOS Management API

Multiple post-authentication stack-based buffer overflow vulnerabilities in the SonicOS management interface due to improper bounds checking in a API endpoint.

CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed
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Nsa 2700 Nsa 2800 Nsa 3700 and 30 more
CVE-2023-39277

SonicOS post-authentication stack-based buffer overflow vulnerability in the sonicflow.csv and appflowsessions.csv URL endpoints leads to a firewall crash.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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Nsa2700 Nsa3700 Nsa4700 and 58 more
CVE-2023-41715

SonicOS post-authentication Improper Privilege Management vulnerability in the SonicOS SSL VPN Tunnel allows users to elevate their privileges inside the tunnel.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
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CVE-2023-39276

SonicOS post-authentication stack-based buffer overflow vulnerability in the getBookmarkList.json URL endpoint leads to a firewall crash.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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Nsa2700 Nsa3700 Nsa4700 and 58 more
CVE-2026-0401

Null Pointer Dereference Crash Vulnerability in SonicOS

A post-authentication NULL Pointer Dereference vulnerability in SonicOS allows a remote attacker to crash a firewall.

CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed
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Nsa 2700 Nsa 2800 Nsa 3700 and 30 more
CVE-2023-39279

SonicOS post-authentication Stack-Based Buffer Overflow vulnerability in the getPacketReplayData.json URL endpoint leads to a firewall crash.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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CVE-2023-39278

SonicOS post-authentication user assertion failure leads to Stack-Based Buffer Overflow vulnerability via main.cgi leads to a firewall crash.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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CVE-2023-41712

SonicOS post-authentication Stack-Based Buffer Overflow Vulnerability in the SSL VPN plainprefs.exp URL endpoint leads to a firewall crash.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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CVE-2023-1101

SonicOS SSLVPN improper restriction of excessive MFA attempts vulnerability allows an authenticated attacker to use excessive MFA codes.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
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Nsa 2600 Nsa 2650 Nsa 2700 and 65 more
CVE-2023-0656

A Stack-based buffer overflow vulnerability in the SonicOS allows a remote unauthenticated attacker to cause Denial of Service (DoS), which could cause an impacted firewall to crash.

CVSS 3.1 · 7.5 High EPSS 41.3% KEV · Not listed
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Nsa 2700 Nsa 3700 Nsa 4700 and 29 more