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Public proof of conceptFix available

CVE-2018-4993

A public proof of concept exists; no exploitation attested.

  • Published2018-07-09
  • WeaknessCWE-200

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Adobe Acrobat and Reader versions 2018.011.20038 and earlier, 2017.011.30079 and earlier, and 2015.006.30417 and earlier have an NTLM SSO hash theft vulnerability. Successful exploitation could lead to information disclosure.

Timeline

dates in UTC
  1. 2018-07-0919:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-04 03:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-4993?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-4993?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Adobe acrobat dcversion to verify
BranchAffectedFixed in
15.6≥ 15.006.30060, ≤ 15.006.30417no fix published
18.11≥ 15.008.20082, ≤ 18.011.20038no fix published
17.11≥ 17.011.30059, ≤ 17.011.30079no fix published
Adobe acrobat reader dcversion to verify
BranchAffectedFixed in
15.6≥ 15.006.30060, ≤ 15.006.30417no fix published
18.11≥ 15.008.20082, ≤ 18.011.20038no fix published
17.11≥ 17.011.30059, ≤ 17.011.30079no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
1 moduleauxiliary/fileformat/badpdfrank: normalModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

Sources

  • NVDCVSS 3.07.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • NVDweakness (CWE)CWE-200read 2026-10-23
  • FIRST EPSSEPSS score86.7 %read 2026-11-03
  • Metasploit FrameworkMetasploit modules1known since 2026-11-01

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2018-07-09
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2018-4993?

Adobe Acrobat and Reader versions 2018.011.20038 and earlier, 2017.011.30079 and earlier, and 2015.006.30417 and earlier have an NTLM SSO hash theft vulnerability. Successful exploitation could lead to information disclosure.

Is CVE-2018-4993 actively exploited?

Active exploitation of CVE-2018-4993 has not been confirmed. Its EPSS score was 86.7% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-4993?

CVE-2018-4993 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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Sources for this record