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CVE-2009-2478

28
FAUCET Score

CVE-2009-2478 describes a denial-of-service vulnerability in Mozilla Firefox 3.5, where remote attackers can trigger a NULL pointer dereference and application crash through unspecified vectors, linked to a "flash bug." This vulnerability has a CVSS score of 5.0, indicating a medium severity, and can be exploited remotely with low attack complexity, leading to a partial impact on availability. While not listed on the KEV catalog or Hot List, and with no Metasploit or Nuclei modules, there are two ExploitDB entries (EDB-9181 and EDB-9137) referencing remote heap spray and buffer overflow techniques related to "Font tags." Despite these public exploit examples, there is no evidence of active exploitation, and the CVE has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
3.5CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:3.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
7.81%
Probability of exploitation in next 30 days
EPSS Percentile
94.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-9181 · Jul 17, 2009
This CVE's current EPSS score of 0.0781 is in the 92nd percentile among its peer group of 23,723 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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

Vendor Advisories (1)

redhatCVE-2009-2478Critical

firefox 3.5 various flaws

Jul 14, 2009

References

bugzilla.mozilla.org / show_bug.cgi
bugzilla.mozilla.org / show_bug.cgi
Exploit
redhat.com / archives/fedora-package-announce/2009-July/msg00909.html