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."
Published Feb 10, 2011
6.4
MEDIUMCVSS 2.0
EPSS 5.49%
Description
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."
Affected products
No data.
- n/a
- r2
- r2
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.49% (0.05486) | 92.52th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.49% (0.05486) | 91.73th | v5 (v2026.06.15) |
| Mar 17, 2025 | 2.48% (0.02478) | 84.20th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.68% (0.00677) | 80.60th | v3 (v2023.03.01) |
| May 3, 2024 | 0.68% (0.00677) | 79.80th | v3 (v2023.03.01) |
| Jan 9, 2024 | 0.68% (0.00677) | 77.74th | v3 (v2023.03.01) |
| Nov 20, 2023 | 0.54% (0.00541) | 74.69th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.68% (0.00677) | 76.80th | v3 (v2023.03.01) |
| Mar 6, 2023 | 21.61% (0.21605) | 96.57th | v2 (v2022.01.01) |
| Apr 1, 2022 | 21.61% (0.21605) | 96.29th | v2 (v2022.01.01) |
| Feb 4, 2022 | 21.61% (0.21605) | 94.23th | v2 (v2022.01.01) |
References (9)
- http://osvdb.org/70835 vdb-entryx_refsource_OSVDB
- http://secunia.com/advisories/43257 third-party-advisoryx_refsource_SECUNIA
- http://support.avaya.com/css/P8/documents/100127250 x_refsource_CONFIRM
- http://www.securityfocus.com/bid/46140 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id?1025048 vdb-entryx_refsource_SECTRACK
- http://www.vupen.com/english/advisories/2011/0326 vdb-entryx_refsource_VUPEN
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-013 vendor-advisoryx_refsource_MS
- https://exchange.xforce.ibmcloud.com/vulnerabilities/64901 vdb-entryx_refsource_XF
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12498 vdb-entrysignaturex_refsource_OVAL
| Link | Providers | Tags |
|---|---|---|
| http://osvdb.org/70835 | vdb-entryx_refsource_OSVDB | |
| http://secunia.com/advisories/43257 | third-party-advisoryx_refsource_SECUNIA | |
| http://support.avaya.com/css/P8/documents/100127250 | x_refsource_CONFIRM | |
| http://www.securityfocus.com/bid/46140 | vdb-entryx_refsource_BID | |
| http://www.securitytracker.com/id?1025048 | vdb-entryx_refsource_SECTRACK | |
| http://www.vupen.com/english/advisories/2011/0326 | vdb-entryx_refsource_VUPEN | |
| https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-013 | vendor-advisoryx_refsource_MS | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/64901 | vdb-entryx_refsource_XF | |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12498 | vdb-entrysignaturex_refsource_OVAL |
Change history (0)
No recorded changes yet.