Integer underflow in the BowserWriteErrorLogEntry function in the Common Internet File System (CIFS) browser service in Mrxsmb.sys or bowser.sys in Active Directory in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote attackers to execute arbitrary code or cause a denial of service (system crash) via a malformed BROWSER ELECTION message, leading to a heap-based buffer overflow, aka "Browser Pool Corruption Vulnerability." NOTE: some of these details are obtained from third party information
Published Feb 16, 2011
10.0
HIGHCVSS 2.0
EPSS 68.08%
Description
Integer underflow in the BowserWriteErrorLogEntry function in the Common Internet File System (CIFS) browser service in Mrxsmb.sys or bowser.sys in Active Directory in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote attackers to execute arbitrary code or cause a denial of service (system crash) via a malformed BROWSER ELECTION message, leading to a heap-based buffer overflow, aka "Browser Pool Corruption Vulnerability." NOTE: some of these details are obtained from third party information.
Affected products
No data.
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
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:C/I:C/A:C
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 (27 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 68.08% (0.68084) | 99.31th | v5 (v2026.06.15) |
| Jun 15, 2026 | 68.08% (0.68084) | 99.23th | v5 (v2026.06.15) |
| Feb 28, 2026 | 78.08% (0.78076) | 98.99th | v4 (v2025.03.14) |
| Feb 27, 2026 | 80.54% (0.80542) | 99.10th | v4 (v2025.03.14) |
| Dec 28, 2025 | 79.50% (0.79502) | 99.04th | v4 (v2025.03.14) |
| Dec 27, 2025 | 81.02% (0.81022) | 99.12th | v4 (v2025.03.14) |
| Oct 28, 2025 | 79.50% (0.79502) | 99.04th | v4 (v2025.03.14) |
| Oct 27, 2025 | 81.02% (0.81022) | 99.11th | v4 (v2025.03.14) |
| Oct 26, 2025 | 79.50% (0.79502) | 99.04th | v4 (v2025.03.14) |
| Jun 4, 2025 | 81.34% (0.81335) | 99.11th | v4 (v2025.03.14) |
| Mar 30, 2025 | 79.59% (0.79594) | 99.03th | v4 (v2025.03.14) |
| Mar 29, 2025 | 82.63% (0.82630) | 99.04th | v4 (v2025.03.14) |
| Mar 17, 2025 | 79.59% (0.79594) | 99.04th | v4 (v2025.03.14) |
| Dec 17, 2024 | 96.09% (0.96093) | 99.64th | v3 (v2023.03.01) |
| Dec 12, 2024 | 94.58% (0.94579) | 99.34th | v3 (v2023.03.01) |
| Oct 9, 2024 | 94.55% (0.94552) | 99.29th | v3 (v2023.03.01) |
| Jul 14, 2024 | 95.74% (0.95737) | 99.46th | v3 (v2023.03.01) |
| Jun 1, 2024 | 95.18% (0.95178) | 99.33th | v3 (v2023.03.01) |
| Apr 18, 2024 | 94.86% (0.94859) | 99.25th | v3 (v2023.03.01) |
| Mar 4, 2024 | 95.14% (0.95136) | 99.26th | v3 (v2023.03.01) |
| Jan 14, 2024 | 94.42% (0.94415) | 99.03th | v3 (v2023.03.01) |
| Oct 6, 2023 | 95.05% (0.95053) | 99.06th | v3 (v2023.03.01) |
| Apr 30, 2023 | 95.22% (0.95223) | 98.93th | v3 (v2023.03.01) |
| Mar 7, 2023 | 95.37% (0.95373) | 98.90th | v3 (v2023.03.01) |
| Mar 6, 2023 | 82.99% (0.82991) | 99.58th | v2 (v2022.01.01) |
| Apr 7, 2022 | 82.99% (0.82991) | 99.54th | v2 (v2022.01.01) |
| Feb 4, 2022 | 83.49% (0.83493) | 99.53th | v2 (v2022.01.01) |
References (14)
- http://archives.neohapsis.com/archives/fulldisclosure/2011-02/0284.html mailing-listx_refsource_FULLDISC
- http://blogs.technet.com/b/mmpc/archive/2011/02/16/my-sweet-valentine-the-cifs-browser-protocol-heap-corruption-vulnerability.aspx x_refsource_CONFIRM
- http://blogs.technet.com/b/srd/archive/2011/02/16/notes-on-exploitability-of-the-recent-windows-browser-protocol-issue.aspx x_refsource_CONFIRM
- http://secunia.com/advisories/43299 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://www.exploit-db.com/exploits/16166 exploitx_refsource_EXPLOIT-DB
- http://www.kb.cert.org/vuls/id/323172 third-party-advisoryx_refsource_CERT-VNUS Government Resource
- http://www.securityfocus.com/bid/46360 vdb-entryx_refsource_BIDExploit
- http://www.securitytracker.com/id?1025328 vdb-entryx_refsource_SECTRACK
- http://www.us-cert.gov/cas/techalerts/TA11-102A.html third-party-advisoryx_refsource_CERTUS Government Resource
- http://www.vupen.com/english/advisories/2011/0394 vdb-entryx_refsource_VUPENVendor Advisory
- http://www.vupen.com/english/advisories/2011/0938 vdb-entryx_refsource_VUPENVendor Advisory
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-019 vendor-advisoryx_refsource_MS
- https://exchange.xforce.ibmcloud.com/vulnerabilities/65376 vdb-entryx_refsource_XF
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12637 vdb-entrysignaturex_refsource_OVAL
Change history (0)
No recorded changes yet.