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Fencer Vulns
medium 4.3

CVE-2009-3566 json

McAfee IntruShield Network Security Manager (NSM) before 5.1.11.8.1 does not include the HTTPOnly flag in the Set-Cookie header for the ses…

published 2009-11-13 16 y ago modified 2026-06-16 4 mo ago also EUVD-2009-3547

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.0%
EPSS 4.0% chance of exploitation in 30 days, percentile 90%
public exploits
1
Exploit-DB

Summary

McAfee IntruShield Network Security Manager (NSM) before 5.1.11.8.1 does not include the HTTPOnly flag in the Set-Cookie header for the session identifier, which allows remote attackers to hijack a session by leveraging a cross-site scripting (XSS) vulnerability.

Timeline

  1. First public exploit (EDB-33347)
  2. Published

Exploit prediction

4.04% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-33347 McAfee Network Security Manager 5.1.7 - Information Disclosure webapps, 2009-11-06
  • securityfocus.com http://www.securityfocus.com/bid/37004 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.