CVE-2011-0091
Kerberos in Microsoft Windows Server 2008 R2 and Windows 7 does not prevent a session from...
Kerberos in Microsoft Windows Server 2008 R2 and Windows 7 does not prevent a session from changing from strong encryption to DES encryption, which allows man-in-the-middle attackers to spoof network traffic and obtain sensitive information via a DES downgrade, aka "Kerberos Spoofing Vulnerability."
Exploit likelihood
What each source reports
NVD Score used
Kerberos in Microsoft Windows Server 2008 R2 and Windows 7 does not prevent a session from changing from strong encryption to DES encryption, which allows man-in-the-middle attackers to spoof network traffic and obtain sensitive information via a DES downgrade, aka "Kerberos Spoofing Vulnerability."
- Record
CVE-2011-0091- CVSS 2.0
- 6.4 Medium
AV:N/AC:L/Au:N/C:P/I:P/A:N - Weakness
- CWE-287
- Updated
- 2026-11-02
CVE List No score
Kerberos in Microsoft Windows Server 2008 R2 and Windows 7 does not prevent a session from changing from strong encryption to DES encryption, which allows man-in-the-middle attackers to spoof network traffic and obtain sensitive information via a DES downgrade, aka "Kerberos Spoofing Vulnerability."
- Record
CVE-2011-0091- Updated
- 2026-11-02
EUVDEUVD-2011-0117 No score
Kerberos in Microsoft Windows Server 2008 R2 and Windows 7 does not prevent a session from changing from strong encryption to DES encryption, which allows man-in-the-middle attackers to spoof network traffic and obtain sensitive information via a DES downgrade, aka "Kerberos Spoofing Vulnerability."
- Record
EUVD-2011-0117- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-49wj-vp5r-r79v No score
Kerberos in Microsoft Windows Server 2008 R2 and Windows 7 does not prevent a session from...
Kerberos in Microsoft Windows Server 2008 R2 and Windows 7 does not prevent a session from changing from strong encryption to DES encryption, which allows man-in-the-middle attackers to spoof network traffic and obtain sensitive information via a DES downgrade, aka "Kerberos Spoofing Vulnerability."
- Record
GHSA-49wj-vp5r-r79v- Weakness
- CWE-287
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2011-0091 is a medium vulnerability (CVSS 6.4) in Microsoft Windows 7, published February 10, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 5.49%, the 92nd percentile. No source names a fixed version.