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Email Security CVE-2023-0655

MEDIUM
Error Message Information Leak (CWE-209)
2023-02-14 PSIRT@sonicwall.com
5.3
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A10:2025 - Mishandling of Exceptional Conditions
ASVS 5.0
V16 - Security Logging and Error Handling Error message sanitization
MITRE ATT&CK

1 technique across 1 tactic: Discovery

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS score of 5.3 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.7% exploitation probability (EPSS)

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AnalysisAI

SonicWall Email Security contains a vulnerability that could permit a remote unauthenticated attacker access to an error page that includes sensitive information about users email addresses. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-209. SonicWall Email Security contains a vulnerability that could permit a remote unauthenticated attacker access to an error page that includes sensitive information about users email addresses. Affected products include: Sonicwall Email Security.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

DescriptionNVD

SonicWall Email Security contains a vulnerability that could permit a remote unauthenticated attacker access to an error page that includes sensitive information about users email addresses.

Threat Intelligence Overview

EPSS Score
0.7%
Top 50% exploitable
Data Quality
2 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.7%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

27
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +26
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)NVD

cpe:2.3:a:sonicwall:email_security:*:*:*:*:*:*:*:*
CVE-2021-44228 CRITICAL POC
10.0 Dec 10

Apache Log4j2 contains a critical JNDI injection vulnerability known as 'Log4Shell' that allows unauthenticated remote c

CVE-2021-20021 CRITICAL POC
9.8 Apr 09

A vulnerability in the SonicWall Email Security version 10.0.9.x allows an attacker to create an administrative account

CVE-2021-20023 MEDIUM
4.9 Apr 20

SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to read an

CVE-2021-45105 MEDIUM
5.9 Dec 18

Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursio

CVE-2021-20022 HIGH
7.2 Apr 09

SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to upload a

CVE-2018-3639 MEDIUM POC
5.5 May 22

Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addres

CVE-2021-3450 HIGH
7.4 Mar 25

The X509_V_FLAG_X509_STRICT flag enables additional security checks of the certificates present in a certificate chain.

CVE-2023-2080 CRITICAL
9.8 Jun 15

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in Forcepoint Cloud S

CVE-2022-1700 CRITICAL
9.8 Sep 12

Improper Restriction of XML External Entity Reference ('XXE') vulnerability in the Policy Engine of Forcepoint Data Loss

CVE-2019-6140 CRITICAL
9.8 Apr 09

A configuration issue has been discovered in Forcepoint Email Security 8.4.x and 8.5.x: the product is left in a vulnera

CVE-2026-66150 HIGH
7.8 Aug 11

OS command injection via the SNMP-handling code path in SonicWall Email Security 10.0.35.8405 and earlier grants a low-p

CVE-2026-66149 HIGH
7.8 Aug 11

OS command injection in SonicWall Email Security (versions 10.0.35.8405 and earlier) allows an authenticated restricted

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