Is CVE-2012-2420 being actively exploited?

CVE-2012-2420 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2012-2420?

CVE-2012-2420 has a CVSS 2.0 base score of 1.8 (LOW).

CVE-2012-2420

LOW · CVSS 1.8EPSS 1.3%EU EUVD

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.

Key facts

CVSS score: 1.8 (v2.0)
Severity: LOW
CVSS vector: AV:A/AC:H/Au:N/C:P/I:N/A:N
Weakness (CWE): CWE-200
EPSS score: 1.3% (71th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2012-2406)
Published: April 25, 2012
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2012-2406 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

intuit / quickbooks
intuit / quickbooks
intuit / quickbooks
intuit / quickbooks
microsoft / internet explorer

References

http://osvdb.org/80820
http://www.kb.cert.org/vuls/id/232979(US Government Resource)
http://www.securityfocus.com/archive/1/522138(Exploit)
https://exchange.xforce.ibmcloud.com/vulnerabilities/74548

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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