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CVE-2011-5266

31
FAUCET Score

CVE-2011-5266 describes a critical SQL injection filter bypass vulnerability affecting Imperva SecureSphere Web Application Firewall (WAF) versions released before August 12, 2010. This flaw, categorized as CWE-89, allows an unauthenticated attacker to execute arbitrary SQL commands with high impact on confidentiality, integrity, and availability, as reflected by its CVSS v3.1 score of 9.8. Despite its severe nature, there is no evidence of active exploitation, publicly available exploit code in Metasploit or ExploitDB, or significant community discussion or media coverage. The vulnerability is not listed in CISA's KEV catalog, suggesting it is not widely exploited in the wild.

Impacted Technologies

VendorProductVersion(s)CPE
< 2010-08-12CPE matchmatch criteria
cpe:2.3:a:imperva:securesphere_web_application_firewall:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.18%
Probability of exploitation in next 30 days
EPSS Percentile
64.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0118 is in the 50th percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

seclists.org / fulldisclosure/2011/May/163
ExploitMailing ListThird Party Advisory