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Servers and applications

CVE-2017-11742

The writeRandomBytes_RtlGenRandom function in xmlparse.c in libexpat in Expat 2.2.1 and 2.2.2 on Windows allows local users to gain privileges via a Trojan horse ADVAPI32.DLL in the current working directory because of an untrusted search path, aka DLL hijacking.

Severity
High 7.8
Published
30 Jul 2017
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
0.5% in the next 30 daysHigher than 40% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
CWE-426
Attack
Needs local access · Needs a user account · No user action needed
Attacker can
Read data · Change data · Take it down
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Sources
NVD

Affected software

SoftwareAffected versions
ExpatServers and applications · cpe:a:libexpat_project:libexpat
  • Version 2.2.1
  • Version 2.2.2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2017-11742
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2017-11742