How severe is CVE-2022-22274?

CVE-2022-22274 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-22274 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 57% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-22274?

CVE-2022-22274 primarily affects Sonicwall Sonicos. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-22274?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2022-22274 published?

CVE-2022-22274 was published on 2022-03-25 and last updated on 2026-06-17.

CVE-2022-22274

CVE-2022-22274 is a critical-severity vulnerability in Sonicwall Sonicos with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 57% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 57% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Sonicwall Sonicos
Published: 2022-03-25
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2022-22274?: 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.
How severe is CVE-2022-22274?: CVE-2022-22274 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-22274 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 57% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-22274?: CVE-2022-22274 primarily affects Sonicwall Sonicos. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-22274?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2022-22274 published?: CVE-2022-22274 was published on 2022-03-25 and last updated on 2026-06-17.

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0003

Affected products (2)

cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
cpe:2.3:o:sonicwall:sonicosv:*:*:*:*:*:*:*:*

More vulnerabilities in Sonicwall Sonicos

CVE-2025-40600 — Critical (CVSS 9.8): Use of Externally-Controlled Format String vulnerability in the SonicOS SSL VPN interface allows a remote…
CVE-2024-53704 — Critical (CVSS 9.8): An Improper Authentication vulnerability in the SSLVPN authentication mechanism allows a remote attacker to bypass…
CVE-2024-40766 — Critical (CVSS 9.8): An improper access control vulnerability has been identified in the SonicWall SonicOS management access, potentially…
CVE-2024-22394 — Critical (CVSS 9.8): An improper authentication vulnerability has been identified in SonicWall SonicOS SSL-VPN feature, which in specific…
CVE-2020-5135 — Critical (CVSS 9.8): A buffer overflow vulnerability in SonicOS allows a remote attacker to cause Denial of Service (DoS) and potentially…
CVE-2019-12261 — Critical (CVSS 9.8): Wind River VxWorks 6.7 though 6.9 and vx7 has a Buffer Overflow in the TCP component (issue 3 of 4). This is an IPNET…

All CVEs affecting Sonicwall Sonicos →

Other CWE-787 (Out-of-bounds Write) vulnerabilities

CVE-2026-42369 — Critical (CVSS 10.0): GV-VMS V20 is a Video Monitoring Software used to gather the feeds of many surveillance cameras and manage other…
CVE-2026-4746 — Critical (CVSS 10.0): Out-of-bounds Write vulnerability in timeplus-io proton (base/poco/Foundation/src‎ modules). This vulnerability is…
CVE-2025-43300 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS…
CVE-2025-24201 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
CVE-2024-42479 — Critical (CVSS 10.0): llama.cpp provides LLM inference in C/C++. The unsafe `data` pointer member in the `rpc_tensor` structure can cause…
CVE-2024-39791 — Critical (CVSS 10.0): Stack-based buffer overflow vulnerabilities affecting Vonets industrial wifi bridge relays and wifi bridge…

Browse all CWE-787 (Out-of-bounds Write) vulnerabilities →