Critical severity · published Jul 29, 2025
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
9.8
CVSS
0.9%
EPSS
No
On KEV
Description
Use of Externally-Controlled Format String vulnerability in the SonicOS SSL VPN interface allows a remote unauthenticated attacker to cause service disruption.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 61% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SO
Sonicos · Sonicwall
7.1.1-7040 before 7.3.0-7012 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-40600
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-40600
Vendor Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2025-0013
More from Sonicos
9.8
CVE-2024-53704
SonicWall SonicOS SSLVPN Improper Authentication Vulnerability
9.8
CVE-2024-40766
SonicWall SonicOS Improper Access Control Vulnerability
9.8
CVE-2020-5135
SonicWall SonicOS Buffer Overflow Vulnerability
9.8
CVE-2024-40765
An Integer-based buffer overflow vulnerability in the SonicOS via IPSec allows a remote attacker in specific conditions to cause Denial of Service (DoS) and potentially execute…
9.8
CVE-2024-40762
Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) in the SonicOS SSLVPN authentication token generator that, in certain cases, can be predicted by an attacker…