CVE-2002-0863

Remote Data Protocol (RDP) version 5.0 in Microsoft Windows 2000 and RDP 5.1 in Windows XP does not encrypt the checksums of plaintext session data, which could allow a remote attacker to determine the contents of encrypted sessions via sniffing, aka "Weak Encryption in RDP Protocol."

Published: 2002-10-11 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2002-0863 is rated Moderate Risk (56.2/100): CVSS Medium severity, with high exploitation likelihood (EPSS 24.00%, 98th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +2.02% over the last day, indicating growing attacker interest. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2002-0863

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-20 21.98% 24.00% +2.02%
2 2026-06-15 15.94% 21.98% +6.04%
3 2026-04-23 15.94%

Full EPSS history (21 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2002-0863

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
10.0 2.9 [email protected]

Weakness enumeration for CVE-2002-0863

Affected software / configurations for CVE-2002-0863

Vendor Product Version Raw CPE
microsoft .net_windows_server beta3 cpe:2.3:a:microsoft:.net_windows_server:beta3:*:standard:*:*:*:*:*
microsoft windows_2000 cpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:*
microsoft windows_2000 cpe:2.3:o:microsoft:windows_2000:*:sp1:*:*:*:*:*:*
microsoft windows_2000 cpe:2.3:o:microsoft:windows_2000:*:sp2:*:*:*:*:*:*
microsoft windows_2000 cpe:2.3:o:microsoft:windows_2000:*:sp3:*:*:*:*:*:*
microsoft windows_2000_terminal_services cpe:2.3:o:microsoft:windows_2000_terminal_services:*:*:*:*:*:*:*:*
microsoft windows_2000_terminal_services cpe:2.3:o:microsoft:windows_2000_terminal_services:*:sp1:*:*:*:*:*:*
microsoft windows_2000_terminal_services cpe:2.3:o:microsoft:windows_2000_terminal_services:*:sp2:*:*:*:*:*:*
microsoft windows_2000_terminal_services cpe:2.3:o:microsoft:windows_2000_terminal_services:*:sp3:*:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:*:terminal_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp1:terminal_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp2:terminal_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp3:terminal_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp4:terminal_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp5:terminal_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp6:terminal_server:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp6a:terminal_server:*:*:*:*:*
microsoft windows_xp cpe:2.3:o:microsoft:windows_xp:*:*:64-bit:*:*:*:*:*
microsoft windows_xp cpe:2.3:o:microsoft:windows_xp:*:*:home:*:*:*:*:*
microsoft windows_xp cpe:2.3:o:microsoft:windows_xp:*:gold:professional:*:*:*:*:*
microsoft windows_xp cpe:2.3:o:microsoft:windows_xp:*:sp1:64-bit:*:*:*:*:*
microsoft windows_xp cpe:2.3:o:microsoft:windows_xp:*:sp1:home:*:*:*:*:*

References for CVE-2002-0863

cvelogic Threat Intelligence