Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2011-2526

19
FAUCET Score

CVE-2011-2526 describes a vulnerability in Apache Tomcat versions 5.5.x, 6.x, and 7.x when sendfile is enabled for specific connectors. This flaw allows local users, through an untrusted web application, to bypass file access restrictions or trigger a denial of service via an infinite loop or JVM crash. The vulnerability has a CVSS score of 4.4, indicating a medium severity with local access and medium attack complexity, potentially leading to partial confidentiality, integrity, and availability impacts. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
5.5.0CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:5.5.0:*:*:*:*:*:*:*
5.5.1CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:5.5.1:*:*:*:*:*:*:*
5.5.2CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:5.5.2:*:*:*:*:*:*:*
5.5.3CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:5.5.3:*:*:*:*:*:*:*
5.5.4CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:5.5.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.4MEDIUM

AV:L/AC:M/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
3.4
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.70%
Probability of exploitation in next 30 days
EPSS Percentile
49.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0070 is in the 84th percentile among its peer group of 1,595 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (23)

mavenpatch availablevia ghsa
Product: org.apache.tomcat:tomcatFixed in: 6.0.33
mavenpatch availablevia ghsa
Product: org.apache.tomcat:tomcatFixed in: 7.0.19
mavenpatch availablevia ghsa
Product: org.apache.tomcat:tomcatFixed in: 5.5.34
redhatpatch availablevia redhat_api
Product: JBoss Communications Platform 5.1
View patch
redhatpatch availablevia redhat_api
Product: JBoss Enterprise BRMS Platform 5.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: tomcat6-0:6.0.24-35.el6_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 4.3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 5.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 5 for RHEL 4Fixed in: jbossweb-0:2.1.12-3_patch_03.2.ep5.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 5 for RHEL 5Fixed in: jbossweb-0:2.1.12-3_patch_03.2.ep5.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 5 for RHEL 6Fixed in: jbossweb-0:2.1.12-3_patch_03.2.ep5.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 1 for RHEL 5Fixed in: tomcat5-0:5.5.33-27_patch_07.ep5.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 1 for RHEL 5Fixed in: tomcat6-0:6.0.32-24_patch_07.ep5.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 1 for RHEL 6Fixed in: tomcat5-0:5.5.33-28_patch_07.ep5.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 1 for RHEL 6Fixed in: tomcat6-0:6.0.32-24_patch_07.ep5.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Portal 4.3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Portal 5.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss SOA Platform 5.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Web Platform 5.1
View patch
redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Web Server 1.0
View patch
redhatpatch availablevia redhat_api
Product: JBEWP 5 for RHEL 5Fixed in: jbossweb-0:2.1.12-3_patch_03.2.ep5.el5
View patch
redhatpatch availablevia redhat_api
Product: JBEWP 5 for RHEL 6Fixed in: jbossweb-0:2.1.12-3_patch_03.2.ep5.el6
View patch

Vendor Advisories (2)

mavenGHSA-9ggm-7897-x4mgmedium

Improper Input Validation in Apache Tomcat

May 14, 2022
redhatCVE-2011-2526Low

tomcat: security manager restrictions bypass

Jul 13, 2011

References

marc.info
marc.info
marc.info
marc.info
osvdb.org / 73797
osvdb.org / 73798
rhn.redhat.com / errata/RHSA-2012-0074.html
rhn.redhat.com / errata/RHSA-2012-0075.html
rhn.redhat.com / errata/RHSA-2012-0076.html
rhn.redhat.com / errata/RHSA-2012-0077.html
rhn.redhat.com / errata/RHSA-2012-0078.html
rhn.redhat.com / errata/RHSA-2012-0325.html
bugzilla.redhat.com / show_bug.cgi
Patch
secunia.com / advisories/45232
secunia.com / advisories/48308
secunia.com / advisories/57126
exchange.xforce.ibmcloud.com / vulnerabilities/68541
lists.apache.org / thread.html/06cfb634bc7bf37af7d8f760f118018746ad8efbd519c4b789ac9c2e%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/8dcaf7c3894d66cb717646ea1504ea6e300021c85bb4e677dc16b1aa%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/r3aacc40356defc3f248aa504b1e48e819dd0471a0a83349080c6bcbf%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/r584a714f141eff7b1c358d4679288177bd4ca4558e9999d15867d4b5%40%3Cdev.tomcat.apache.org%3E
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14573
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19514
svn.apache.org / viewvc
Patch
svn.apache.org / viewvc
Patch
svn.apache.org / viewvc
Patch
svn.apache.org / viewvc
Patch
tomcat.apache.org / security-5.html
tomcat.apache.org / security-6.html
tomcat.apache.org / security-7.html
debian.org / security/2012/dsa-2401
mandriva.com / security/advisories
securityfocus.com / archive/1/518889/100/0/threaded
securityfocus.com / bid/48667
securitytracker.com / id