4.9

CVE-2026-0206: sonicwall sonicos Stack-based Buffer Overflow

Analyzed
Published 29-04-2026Last modified 29-04-2026

Vulnerability summary

CVE-2026-0206 is a medium (CVSS 4.9) Stack-based Buffer Overflow vulnerability in sonicwall sonicos. EPSS estimates a 0.50% chance of exploitation in the next 30 days, higher than 42.2% 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
0.50%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 29-04-2026
    PublishedVulnerability first disclosed.
  2. 29-04-2026
    Last modifiedVulnerability information updated.

Description

A post-authentication Stack-based Buffer Overflow vulnerabilities in SonicOS allows a remote attacker to crash a firewall.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.50%

Chance of exploitation in the next 30 days

Percentile

42%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.50% 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
  • sonicos6.5.5.1-6n and older versions | 7.0.1-5169 and older versions | 7.3.1-7013 and older versions | 8.1.0-8017 and older versions | < 6.5.5.2-28n | ≥ 7.0.0.0, ≤ 7.0.1-5169 | ≥ 7.1.1-7040, < 7.3.2-7010 | ≥ 8.0.0-8035, < 8.2.0-8009

1 vendor · 1 product

References

1 links