VulnTideExploited vulnerabilities, by vendor. Data as of .
Not in CISA KEVPublished CVSS 9.1 criticalEPSS 0.7% probability of exploitation in 30 days
SonicWall

CVE-2026-81939: A Zip Slip vulnerability in the SonicWall Network Security Manager (NSM) On-Prem file upload and archive processing f…

Is it exploited?

Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of . If CISA adds it, this page shows it as known exploited.

How likely is exploitation in the next 30 days?
0.7%

EPSS score, percentile 52.3 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?
9.1 Critical

CVSS v3.1 base score, from CISA's enrichment of the record

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (1)

Which versions are affected?

Affected

  • 4.3.0 and earlier versions

Versions by product

Source: CISA KEV 2026.10.29, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.

What to do

Advisories and patches

This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

As listed in the CVE record.

SonicWall Network Security Manager (NSM)
StatusVersions
Affected4.3.0 and earlier versions

Versions not listed are: unknown.

Source: CVE List, as of . About the data.

About this vulnerability

A Zip Slip vulnerability in the SonicWall Network Security Manager (NSM) On-Prem file upload and archive processing functionality allows an attacker to extract files outside the intended destination directory using a specially crafted archive.

Summary: CVE record, as of .

  • CISA has not added CVE-2026-81939 to its Known Exploited Vulnerabilities (KEV) catalog, as of 29 Oct 2026.
  • The CVE record was published on 4 Sep 2026.
  • The CVE record carries a CVSS v3.1 base score of 9.1 (Critical), taken from CISA's enrichment of the record.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 0.7% (percentile 52.3), as of 29 Oct 2026. EPSS is a statistical estimate, not a report of exploitation.
  • CISA's SSVC assessment in the CVE record: exploitation none, automatable no, technical impact total.

Source: CISA KEV 2026.10.29, as of ; CVE List, as of ; FIRST EPSS, as of . About the data.

Description

A Zip Slip vulnerability in the SonicWall Network Security Manager (NSM) On-Prem file upload and archive processing functionality allows an attacker to extract files outside the intended destination directory using a specially crafted archive.

Source: CVE List, as of . About the data.

Weakness

CWE-22
  • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.

Timeline

DateEvent
CVE record published

Known exploited SonicWall vulnerabilities

  • CVE-2026-83548: SonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability (added )
  • CVE-2026-83549: SonicWall SMA1000 Appliances OS Command Injection Vulnerability (added )
  • CVE-2026-15409: SonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability (added )
  • CVE-2026-15410: SonicWall SMA1000 Appliances Code Injection Vulnerability (added )
  • CVE-2025-40602: SonicWall SMA1000 Missing Authorization Vulnerability (added )