CVE-2023-0656
CVE-2023-0656 is a high-severity vulnerability in Sonicwall Sonicos with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 41% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-787.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- EPSS exploit prediction: 41% (99th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Sonicwall Sonicos
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2023-0656?
- CVE-2023-0656 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2023-0656 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 41% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-0656?
- CVE-2023-0656 affects Sonicwall Sonicos. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2023-0656?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2023-0656 published?
- CVE-2023-0656 was published on 2023-03-02 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
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