CVE-2011-1870 — Integer overflow in the Client/Server Run-time Subsystem (aka CSRSS) in the Win32 subsystem in Microsoft Windows XP SP2 and SP3, and Windows Server 2003 SP2, allows local users to gain privileges or cause a denial of service (memory corruption) via a crafted application that triggers an incorrect memory assignment for a user transaction, aka "CSRSS Local EOP SrvWriteConsoleOutputString Vulnerability."

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HIGH

Integer overflow in the Client/Server Run-time Subsystem (aka CSRSS) in the Win32 subsystem in Microsoft Windows XP SP2 and SP3, and Windows Server 2003 SP2, allows local users to gain privileges or cause a denial of service (memory corruption) via a crafted application that triggers an incorrect memory assignment for a user transaction, aka "CSRSS Local EOP SrvWriteConsoleOutputString Vulnerability."

Published Jul 13, 2011

7.2

HIGH

CVSS 2.0

EPSS 2.24%

Description

Integer overflow in the Client/Server Run-time Subsystem (aka CSRSS) in the Win32 subsystem in Microsoft Windows XP SP2 and SP3, and Windows Server 2003 SP2, allows local users to gain privileges or cause a denial of service (memory corruption) via a crafted application that triggers an incorrect memory assignment for a user transaction, aka "CSRSS Local EOP SrvWriteConsoleOutputString Vulnerability."

Affected products

Remediation

No remediation recorded yet.

Metrics

2.24% 0.02244

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.02244

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 (14 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	2.24% (0.02244)	82.25th	v5 (v2026.06.15)
Jun 15, 2026	2.24% (0.02244)	80.52th	v5 (v2026.06.15)
Mar 30, 2025	3.12% (0.03122)	85.66th	v4 (v2025.03.14)
Mar 29, 2025	1.31% (0.01311)	67.51th	v4 (v2025.03.14)
Mar 17, 2025	3.18% (0.03183)	86.11th	v4 (v2025.03.14)
Dec 12, 2024	0.04% (0.00044)	15.20th	v3 (v2023.03.01)
Jun 20, 2024	0.04% (0.00044)	13.29th	v3 (v2023.03.01)
Nov 19, 2023	0.04% (0.00044)	11.28th	v3 (v2023.03.01)
Aug 1, 2023	0.05% (0.00049)	15.39th	v3 (v2023.03.01)
Mar 7, 2023	0.06% (0.00058)	22.50th	v3 (v2023.03.01)
Mar 6, 2023	1.87% (0.01866)	77.24th	v2 (v2022.01.01)
Feb 23, 2023	1.87% (0.01866)	77.20th	v2 (v2022.01.01)
Apr 1, 2022	1.87% (0.01866)	75.17th	v2 (v2022.01.01)
Feb 4, 2022	1.87% (0.01866)	54.48th	v2 (v2022.01.01)

Weaknesses (1)

CWE-189

References (5)

http://osvdb.org/73795
vdb-entryx_refsource_OSVDB
http://www.securityfocus.com/bid/48605
vdb-entryx_refsource_BID
http://www.us-cert.gov/cas/techalerts/TA11-193A.html
third-party-advisoryx_refsource_CERTUS Government Resource
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-056
vendor-advisoryx_refsource_MS
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12889
vdb-entrysignaturex_refsource_OVAL

Link	Providers	Tags
http://osvdb.org/73795		vdb-entryx_refsource_OSVDB
http://www.securityfocus.com/bid/48605		vdb-entryx_refsource_BID
http://www.us-cert.gov/cas/techalerts/TA11-193A.html		third-party-advisoryx_refsource_CERTUS Government Resource
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-056		vendor-advisoryx_refsource_MS
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12889		vdb-entrysignaturex_refsource_OVAL

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner microsoft

Published Jul 13, 2011

Updated Aug 6, 2024

Reserved May 4, 2011

Link CVE-2011-1870

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2011-1870

Red Hat

Severity n/a

Public date n/a

Links CVE-2011-1870