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TI-1999-00943 Aliases CVE-1999-0993GHSA-r287-63xg-jpw7

Modifications to ACLs (Access Control Lists) in Microsoft Exchange 5.5 do not take effect…

Priority MEDIUM 43CWE-665Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Partial · Partial · Partial
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA.

Summary

Modifications to ACLs (Access Control Lists) in Microsoft Exchange 5.5 do not take effect until the directory store cache is refreshed.

Why it matters now

EPSS 0.0707 94th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:exchange_server:5.0:-:*:*:*:*:*:*5.0VulnerableMicrosoft
cpe:2.3:a:microsoft:exchange_server:5.5:-:*:*:*:*:*:*5.5VulnerableMicrosoft
  • cpe:2.3:a:microsoft:exchange_server:5.0:-:*:*:*:*:*:* Versions 5.0 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:exchange_server:5.5:-:*:*:*:*:*:* Versions 5.5 Vulnerable ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-1999-0993
  2. 2026-10-03 Alias added: GHSA-r287-63xg-jpw7

References

—

  • TI-2024-14170 Microsoft Exchange Server Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-19610 Microsoft Exchange Server Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-13547 Microsoft Exchange Server Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-13502 Microsoft Exchange Server Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-08465 Microsoft Exchange Server Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-07929 Microsoft Exchange Server Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 8.8
See all 258 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences