CVEvulnerability

CVE-2021-20023

4.9 MEDIUM Known exploited Published 2021-04-20 Modified 2026-10-01 Official page ↗

CISA Known Exploited Vulnerability

SonicWall Email Security Path Traversal Vulnerability — SonicWall SonicWall Email Security

SonicWall Email Security contains a path traversal vulnerability that allows a post-authenticated attacker to read files on the remote host. This vulnerability has known usage in a SonicWall Email Security exploit chain along with CVE-2021-20021 and CVE-2021-20022 to achieve privilege escalation.

Added to KEV
2021-11-03
Remediation due
2021-11-17
Ransomware use
Known
Required action
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2021-20023
Status
Analyzed
Published
2021-04-20
Last modified
2026-10-01
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.9 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
4.9 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0 ([email protected])
4.0 MEDIUM — AV:N/AC:L/Au:S/C:P/I:N/A:N
Weaknesses
CWE-22

Description

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 configurations

• sonicwall email security (< 10.0.9.6173) • sonicwall email security appliance 9000 firmware (< 10.0.9.6177) • sonicwall email security appliance 3300 firmware (< 10.0.9.6177) • sonicwall email security appliance 4300 firmware (< 10.0.9.6177) • sonicwall email security appliance 8300 firmware (< 10.0.9.6177) • sonicwall email security appliance 5000 firmware (< 10.0.9.6177) • sonicwall email security appliance 7000 firmware (< 10.0.9.6177) • sonicwall email security appliance 5050 firmware (< 10.0.9.6177) • sonicwall email security appliance 7050 firmware (< 10.0.9.6177) • sonicwall email security virtual appliance (< 10.0.9.6177) • sonicwall hosted email security (< 10.0.9.6173)

Related

Weakness · CWE (1)

  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory weakness

References