CISA KEV · Known exploitedMedium

CVE-2021-20023

SonicWall SonicWall Email Security

SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to read an arbitrary file on the remote host.

CVSS
4.9
EPSS
50.2%
98.8% percentile
CISA KEV
Listed
Published
2021.04.20
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability50.2%
Technical severityCVSS 4.9

Vulnerability overview

SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to read an arbitrary file on the remote host.

Affected product and versions

Product
SonicWall SonicWall Email Security
Affected versions
10.0.9 and earlier, < 10.0.9.6173, < 10.0.9.6177
Fixed versions
10.0.9.6173, 10.0.9.6177

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2021.11.17
  1. 1
    Identify

    Confirm that SonicWall SonicWall Email Security and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
CWE
CWE-22
KEV added
2021.11.03
Ransomware use
확인됨
CVE-2021-20023 — SonicWall SonicWall Email Security | SECUFOCUS NOW