Microsoft Exchange 5.5 SMTP Address Encapsulated Addres privileges management

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability has been found in Microsoft Exchange 5.5 and classified as critical. This affects an unknown function of the component SMTP Address Handler. The manipulation as part of Encapsulated Addres leads to privileges management. This vulnerability is traded as CVE-1999-0682. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Microsoft Exchange 5.5 (Groupware Software). It has been rated as critical. This issue affects an unknown part of the component SMTP Address Handler. The manipulation as part of a Encapsulated Addres leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is availability. The summary by CVE is:

Microsoft Exchange 5.5 allows a remote attacker to relay email (i.e. spam) using encapsulated SMTP addresses, even if the anti-relaying features are enabled.

The weakness was shared 08/06/1999 with Microsoft (Website). It is possible to read the advisory at securityfocus.com. The identification of this vulnerability is CVE-1999-0682. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 74067 (Microsoft Exchange Server 5.5 Encapsulated SMTP Address Vulnerability).

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (3107), SecurityFocus (BID 567†) and Vulnerability Center (SBV-3680†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
ISS Proventia IPS: 🔍

Timelineinfo

08/06/1999 🔍
08/06/1999 +0 days 🔍
08/06/1999 +0 days 🔍
08/06/1999 +0 days 🔍
02/10/2004 +1649 days 🔍
06/21/2014 +3784 days 🔍
10/24/2025 +4143 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: securityfocus.com⛔
Organization: Microsoft
Status: Confirmed

CVE: CVE-1999-0682 (🔍)
GCVE (CVE): GCVE-0-1999-0682
GCVE (VulDB): GCVE-100-14759
X-Force: 3107
SecurityFocus: 567 - NT Exchange Server Encapsulated SMTP Address Vulnerability
Vulnerability Center: 3680 - [MS99-027] Microsoft Exchange 5.5 Allows Email Relay via Encapsulated SMTP Addresses, Medium

Entryinfo

Created: 06/21/2014 18:02
Updated: 10/24/2025 07:07
Changes: 06/21/2014 18:02 (58), 05/19/2019 16:31 (3), 10/24/2025 07:07 (20)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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