CVE-2012-2420

Exp

The intu-help-qb (aka Intuit Help System Async Pluggable Protocol) handlers in HelpAsyncPluggableProtocol.dll in Intuit QuickBooks 2009 through 2012, when Internet Explorer is used, might allow remote attackers to obtain sensitive information via a URI with a % (percent) character as its (1) last or (2) second-to-last character, in situations where a certain "post-URL data" buffer contains a 0x0000 character but a buffer overflow does not occur.

Published: 2012-04-25 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2012-2420 is rated Exploit Available (50/100): CVSS Low severity, with medium exploitation likelihood (EPSS 1.32%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.16% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2012-2420

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2012-2420

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.16% 1.32% +1.16%
2 2025-03-17 0.29% 0.16% -0.13%
3 2023-03-07 — 0.29% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2012-2420

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
1.8 2.0 LOW
AV:A/AC:H/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:A)
Requires access to an adjacent network segment.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 3.2 2.9 [email protected]

Weakness enumeration for CVE-2012-2420

Affected software / configurations for CVE-2012-2420

Vendor Product Version Raw CPE
intuit quickbooks 2009 cpe:2.3:a:intuit:quickbooks:2009:*:*:*:*:*:*:*
intuit quickbooks 2010 cpe:2.3:a:intuit:quickbooks:2010:*:*:*:*:*:*:*
intuit quickbooks 2011 cpe:2.3:a:intuit:quickbooks:2011:*:*:*:*:*:*:*
intuit quickbooks 2012 cpe:2.3:a:intuit:quickbooks:2012:*:*:*:*:*:*:*

References for CVE-2012-2420

cvelogic Threat Intelligence