SonicOS vulnerabilitiesAnd the versions its exploited flaws hit.
SonicOS is made by SonicWall. We track 59 published vulnerabilities listed under that exact name, across 117 versions. 3 of them are on the list of flaws known to be exploited, the newest added on 18 February 2025. SonicWall lists newer releases under their own names, such as Sonicos Enhanced, so check those pages too.
The most recent SonicOS flaw added to the known-exploited list is CVE-2024-53704, on 18 February 2025. We keep watching the known-exploited list.
Is SonicOS listed under other names? Yes.
SonicWall also lists SonicOS under more specific names, such as Sonicos Enhanced and Sonicos Sslvpn Nacagent. Flaws listed only under those names are counted on their own pages, not here. If you run one of these, open its page for its own exploited flaws.
Which versions of SonicOS do the exploited flaws hit?
Each exploited flaw lists the versions it affects, as published by the vendor. Find your version, then patch.
- CVE-2020-5135Exploited list, 15 Mar 2022
SonicWall SonicOS Buffer Overflow Vulnerability
up to 6.0.5.36.5.0.0 to 6.5.1.116.5.4.0 to 6.5.4.77.0.0.0
2 more exploited flaws name SonicOS without a version of its own, for example as the system other affected software runs on. They are in the list below.
Which SonicOS vulnerabilities are being exploited?
3 flaws are on the government list of vulnerabilities known to be exploited. These are the ones criminals are using now, so they go first, whatever their severity score says.
- 9.8SonicWall SonicOS SSLVPN Improper Authentication Vulnerability
SonicWall SonicOS contains an improper authentication vulnerability in the SSLVPN authentication mechanism that allows a remote attacker to bypass authentication.
- 9.8SonicWall SonicOS Improper Access Control Vulnerability
SonicWall SonicOS contains an improper access control vulnerability that could lead to unauthorized resource access and, under certain conditions, may cause the firewall to crash.
- 9.8SonicWall SonicOS Buffer Overflow Vulnerability
A buffer overflow vulnerability in SonicOS allows a remote attacker to cause Denial of Service (DoS) and potentially execute arbitrary code by sending a malicious request to the firewall.
Which SonicOS flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- 95%
An Improper Authentication vulnerability in the SSLVPN authentication mechanism allows a remote attacker to bypass authentication.
- 84%CVE-2019-12257High
Wind River VxWorks 6.6 through 6.9 has a Buffer Overflow in the DHCP client component.
- 76%CVE-2022-22274Critical
A Stack-based buffer overflow vulnerability in the SonicOS via HTTP request allows a remote unauthenticated attacker to cause Denial of Service (DoS) or potentially results in code execution in the firewall.
- 75%CVE-2019-12255Critical
Wind River VxWorks has a Buffer Overflow in the TCP component (issue 1 of 4).
- 64%CVE-2021-3449Medium
An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client.
- 60%CVE-2019-12265Medium
Wind River VxWorks 6.5, 6.6, 6.7, 6.8, 6.9.3 and 6.9.4 has a Memory Leak in the IGMPv3 client component.
- 41%CVE-2023-0656High
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.
- 27%
A buffer overflow vulnerability in SonicOS allows a remote attacker to cause Denial of Service (DoS) and potentially execute arbitrary code by sending a malicious request to the firewall.
- 27%CVE-2019-12256Critical
Wind River VxWorks 6.9 and vx7 has a Buffer Overflow in the IPv4 component.
- 23%CVE-2019-12260Critical
Wind River VxWorks 6.9 and vx7 has a Buffer Overflow in the TCP component (issue 2 of 4).
Running SonicOS? We'll keep checking.
Looking flaws up one at a time doesn't scale. Tell us what you run once, and we tell you which flaws matter to you, in what order, and keep watching for new ones.
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1 flaw being exploited affects software Acme tracks
SonicWall SonicOS contains an improper authentication vulnerability in the SSLVPN authentication mechanism that allows a remote attacker to bypass authentication.
- Matched to
- SonicOS on Acme's software list
- What to do
- Patch first, then check for signs of use
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
We track 59 published vulnerabilities listed under the name SonicOS, across 117 versions. The most recent SonicOS flaw added to the known-exploited list is CVE-2024-53704, on 18 February 2025.
3 are on the list of flaws known to be exploited. The most recently added are CVE-2024-53704, CVE-2024-40766 and CVE-2020-5135.
SonicWall also lists SonicOS under more specific names, such as Sonicos Enhanced and Sonicos Sslvpn Nacagent. Flaws listed only under those names are counted on their own pages, not here. Open the release you run to see its own list.
Each flaw names its own versions, usually as ranges. The newest, CVE-2020-5135, affects up to 6.0.5.3, 6.5.0.0 to 6.5.1.11, 6.5.4.0 to 6.5.4.7, 7.0.0.0. The versions for every exploited flaw are listed on this page.
Create a Precursor Intelligence account and track SonicOS. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.