Summary
generated automatically from NVD dataMicrosoft Exchange Server 5.5 mishandles MIME headers in which the charset value is left empty. A remote attacker can send a message containing charset="" and cause a denial of service, with no impact on confidentiality or integrity according to the CVSS vector. The issue is known as the "Malformed MIME Header" vulnerability and is rated 5.0 (MEDIUM) under CVSS v2.0.
NVD description
Microsoft Exchange Server 5.5 does not properly handle a MIME header with a blank charset specified, which allows remote attackers to cause a denial of service via a charset="" command, aka the "Malformed MIME Header" vulnerability.
EPSS · FIRST.org
14.8%probability of exploitation in the next 30 days
Higher than 96% of scored CVEs
EPSS (Exploit Prediction Scoring System) estimates, from observed exploitation activity, how likely a CVE is to be exploited in the next 30 days. It complements CVSS, which measures severity, not likelihood. Score of 2026-10-30, recomputed daily by FIRST.org.
CVSS v2.0 Score
Information
- Published
- 11 déc. 2000
- Updated
- 16 juin 2026
- Status
- Modified
- Source
- cve@mitre.org
Affected products
Bounds published by NVD: "< 8.4.27" means 8.4.27 is no longer vulnerable. The fixed release to install is in the vendor advisory.
Weaknesses (CWE)
References (6)
- http://www.securityfocus.com/bid/1869ExploitPatchThird Party AdvisoryVDB EntryVendor Advisory
- http://www.securityfocus.com/bid/1869ExploitPatchThird Party AdvisoryVDB EntryVendor Advisory
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