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5.0
CVE-1999-0682: Microsoft Exchange Server 5.5 lets attackers send spam via relay
CVE-1999-0682 · published 27 years ago
Summary
The Exchange Server 5.5 mail system can be tricked into forwarding email from outsiders, so spam can be sent even when anti‑relay settings are turned on. This can clutter inboxes, waste network bandwidth, and hurt your organization’s reputation. Apply the vendor’s security update or disable the server if you cannot patch, and verify that only authorized users can send mail through it.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| microsoft | exchange_server |
5.5 cpe:2.3:a:microsoft:exchange_server:5.5:-:*:*:*:*:*:* |
Original advisory text
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.
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.
References
- http://support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ237927
- http://www.ciac.org/ciac/bulletins/j-056.shtml Broken Link
- http://www.securityfocus.com/bid/567 Third Party Advisory VDB Entry
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-02... Patch Vendor Advisory
Internet-facing
14 days
Internal
60 days
- Not known to be exploited
- Can be exploited automatically (estimated)
- Gives an attacker partial control (estimated)
Severity
5.0
Medium
Timeline
Published6 Aug 1999
Updated29 Sep 2026
First seen29 Sep 2026
Sources
CVE-1999-0682 · NVD
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