CVE-2011-1968Windows Server 2003 Vulnerability
The Remote Desktop Protocol (RDP) implementation in Microsoft Windows XP SP2 and SP3 and Windows Server 2003 SP2 does not properly process packets in memory, which allows remote attackers to cause a denial of service (reboot) by sending crafted RDP packets triggering access to…
Published Aug 10, 2011 · Updated Apr 28, 2026
Key Facts
Patch immediately- CVE-2011-1968 is a high-severity vulnerability (CVSS 7.1 v2) affecting Windows 2003 Server (Microsoft), Windows Server 2003 (Microsoft), Windows Xp (Microsoft).
- It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Aug 9, 2011. No public exploit code is known.
- EPSS estimates a 26% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v2
7.1
AV:N/AC:M/Au:N/C:N/I:N/A:C
EPSS (30-day exploit likelihood)
26%
Higher than 97.9% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
45/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Aug 9, 2011
-1 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
2
Reports of active use
Description
The Remote Desktop Protocol (RDP) implementation in Microsoft Windows XP SP2 and SP3 and Windows Server 2003 SP2 does not properly process packets in memory, which allows remote attackers to cause a denial of service (reboot) by sending crafted RDP packets triggering access to an object that (1) was not properly initialized or (2) is deleted, as exploited in the wild in 2011, aka "Remote Desktop Protocol Vulnerability."
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CIRCL KEV | Aug 9, 2011 | n/a | Not reported |
| Industry KEV feed | Aug 9, 2011 | n/a | Not reported |
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 2003 ServerMicrosoft | See advisory | n/a |
| Windows Server 2003Microsoft | See advisory | n/a |
| Windows XpMicrosoft | See advisory | n/a |
Timeline
Added to CIRCL KEV
Aug 9, 2011
Added to Industry KEV feed
Aug 9, 2011
Publicly disclosed
Aug 10, 2011
Last updated
Apr 28, 2026
Weakness Type
- CWE-399
References
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- otherMS11-065
- otheroval:org.mitre.oval:def:12806
- otherTA11-221A
FAQ
Common Questions.
The Remote Desktop Protocol (RDP) implementation in Microsoft Windows XP SP2 and SP3 and Windows Server 2003 SP2 does not properly process packets in memory, which allows remote attackers to cause a denial of service (reboot) by sending crafted RDP packets triggering access to an object that (1) was not properly initi…
Affected: Windows 2003 Server (Microsoft); Windows Server 2003 (Microsoft); Windows Xp (Microsoft). The full list is in the CVE brief.
It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Aug 9, 2011.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2011-1968 On Your Attack Surface?
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