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Fencer Vulns
medium 5.0

CVE-2009-3275 json

Blocks/Common/Src/Configuration/Manageability/Adm/AdmContentBuilder.cs in Microsoft patterns & practices Enterprise Library (aka EntLib) al…

published 2009-09-21 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-3258

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.5%
EPSS 3.5% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

Blocks/Common/Src/Configuration/Manageability/Adm/AdmContentBuilder.cs in Microsoft patterns & practices Enterprise Library (aka EntLib) allows context-dependent attackers to cause a denial of service (CPU consumption) via an input string composed of many \ (backslash) characters followed by a " (double quote), related to a certain regular expression, aka a "ReDoS" vulnerability.

Exploit prediction

3.52% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • checkmarx.com http://www.checkmarx.com/Upload/Documents/PDF/Checkmarx_OWASP_IL_2009_ReDoS.pdf referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-134 Use of Externally-Controlled Format String

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.