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01 Record

CVE-2026-0400

A post-authentication Format String vulnerability in SonicOS allows a remote attacker to crash a firewall.

MediumPUBLISHEDCNA: sonicwall
CNA base score4.9 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

02 Description

A post-authentication Format String vulnerability in SonicOS allows a remote attacker to crash a firewall.

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.49% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 42.3% of scored records. A rank, not a probability.
NVD base score
4.9 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Analyzed. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-02-24 14:54Z8 MO AGO
Last updated
2026-02-24 15:35Z8 MO AGO
Reserved
2025-12-02
Assigning CNA
sonicwall
Record state
PUBLISHED
Severity
Medium (CVSS 4.9)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Weaknesses
  • CWE-134Use of Externally-Controlled Format StringBase
Data version
5.2
Document digest
76634ef39df8bd071ee1e9dfa5713950a81e1a9599f620c8bb5f03a807b104c2

05 Affected products

VendorProductVersionsPlatforms
SonicWallSonicOS7.0.1-5169 and older versions, 7.3.1-7013 and older versions, 8.1.0-8017 and older versionsLinux, Gen7, Gen8

06 References