Is CVE-2007-2161 being actively exploited?

CVE-2007-2161 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2007-2161?

CVE-2007-2161 has a CVSS 2.0 base score of 4.3 (MEDIUM).

CVE-2007-2161

MEDIUM · CVSS 4.3EPSS 12.3%EU EUVD

Microsoft Internet Explorer 7 allows remote attackers to cause a denial of service (browser hang) via JavaScript that matches a regular expression against a long string, as demonstrated using /(.)*/.

Key facts

CVSS score: 4.3 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:M/Au:N/C:N/I:N/A:P
EPSS score: 12.3% (96th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2007-2156)
Published: April 22, 2007
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2007-2156 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

microsoft / internet explorer

References

http://osvdb.org/43314(Broken Link)
http://www.securityfocus.com/archive/1/466017/100/0/threaded(Third Party Advisory, VDB Entry)
http://www.securityfocus.com/archive/1/466043/100/0/threaded(Third Party Advisory, VDB Entry)
http://www.securityfocus.com/archive/1/466175/100/0/threaded(Third Party Advisory, VDB Entry)
https://exchange.xforce.ibmcloud.com/vulnerabilities/33715(VDB Entry)

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

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