All vulnerabilities

Servers and applications

CVE-1999-0993

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

Severity
High 7.5
Published
13 Dec 1999
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
7.1% in the next 30 daysHigher than 94% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
CWE-665
Attack
Over the network · No login needed
Attacker can
Read some data · Change some data · Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
Sources
NVD

Affected software

SoftwareAffected versions
Microsoft Exchange ServerServers and applications · cpe:a:microsoft:exchange_server
  • Version 5.0
  • Version 5.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-1999-0993
  • CVE.org https://www.cve.org/CVERecord?id=CVE-1999-0993