4.9

CVE-2026-0399: sonicwall sonicos Stack-based Buffer Overflow

Analyzed
Published 24-02-2026Last modified 24-02-2026

Vulnerability summary

CVE-2026-0399 is a medium (CVSS 4.9) Stack-based Buffer Overflow vulnerability in sonicwall sonicos. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 30.4% of scored vulnerabilities.

Overall risk
20/100
0100
Low · default modelHow is this calculated?
CVSS score
4.9/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.38%
0%100%
Low · +0.05 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 24-02-2026
    PublishedVulnerability first disclosed.
  2. 24-02-2026
    Last modifiedVulnerability information updated.

Description

Multiple post-authentication stack-based buffer overflow vulnerabilities in the SonicOS management interface due to improper bounds checking in a API endpoint.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.38%

Chance of exploitation in the next 30 days

Percentile

30%

Versus all other CVEs

30-day change

Increase +0.05 pp

From 0.32% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Sonicwall1 product
  • sonicos7.0.1-5169 and older versions | 7.3.1-7013 and older versions | 8.1.0-8017 and older versions | < 7.3.2-7010 | < 8.2.0-8009

1 vendor · 1 product

References

1 links