Cyber Resilience

CVE-2026-0205

Sonicwall Sonicos ≤ 6.5.5.2-28n

Published
29 April 2026
Modified
05 May 2026
Patch / advisory
View advisory
CVSS Score v3.1 6.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
EPSS Score 0.0043 35th percentile
Risk Priority 51 floored blend · peak EPSS

Summary

CVE-2026-0205 is a medium-severity Path Traversal: '.../...//' (CWE-35) vulnerability in Sonicwall Sonicos. Its CVSS base score is 6.8 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Data from Local System (T1005); ranked at the 35th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) and AC-3 (Access Enforcement) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

A post-authentication Path Traversal vulnerability in SonicOS allows an attacker to interact with usually restricted services.

CWE(s)
CWE-35

Related Threats

MITRE ATT&CK Enterprise Techniques

T1005 Data from Local System Collection
Adversaries may search local system sources, such as file systems, configuration files, local databases, virtual machine files, or process memory, to find files of interest and sensitive data prior to Exfiltration.
attack.mitre.org →
T1083 File and Directory Discovery Discovery
Adversaries may enumerate files and directories or may search in specific locations of a host or network share for certain information within a file system.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-0206Same product: Sonicwall Nsa 2650
CVE-2026-0204Same product: Sonicwall Nsa 2650
CVE-2024-40766Same product: Sonicwall Nsa 2650
CVE-2026-0400Same product: Sonicwall Nsa 2700
CVE-2026-0399Same product: Sonicwall Nsa 2700
CVE-2026-3439Same product: Sonicwall Nsa 2700
CVE-2025-40601Same product: Sonicwall Nsa 2700
CVE-2026-0402Same product: Sonicwall Nsa 2700
CVE-2023-41712Same product: Sonicwall Nsa 2650
CVE-2023-39278Same product: Sonicwall Nsa 2650

Affected Assets

sonicwall
sonicos
≤ 6.5.5.2-28n · 7.0.0.0 — 7.0.1-5169 · 7.1.1-7040 — 7.3.2-7010

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match

Input validation directly neutralizes path sequences so the traversal cannot be introduced or exploited.

AC-3 Access Enforcement partial match

Enforces access authorizations on the resulting pathname, blocking traversal attempts from succeeding.

AC-4 Information Flow Enforcement partial match

Enforces information flow rules that stop unauthorized directory escapes via crafted paths.

AC-6 Least Privilege partial match

Least privilege reduces the impact of any successful traversal by limiting accessible resources.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require input validation and path sanitization that neutralize traversal sequences.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development can detect path-traversal flaws before release.

A.8.25 Secure development life cycle partial match
prevents

Secure SDLC mandates input validation and path-handling controls that directly mitigate path traversal.

A.8.26 Application security requirements partial match
prevents

Application security requirements include rules for safe file-path construction and canonicalization.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles require proper directory restrictions and input sanitization to prevent traversal.

A.8.28 Secure coding partial match
prevents

Secure coding standards explicitly forbid unsafe path concatenation and mandate canonicalization routines.

A.8.3 Information access restriction partial match
mitigates

Information access restriction limits file reachability but does not address the input-validation flaw itself.

References