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.

Published: 2018-07-09 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-4993 is rated Moderate Risk (63.2/100): CVSS High severity, with high exploitation likelihood (EPSS 68.26%, 99th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-4993

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-05 69.59% 68.26% -1.33%
2 2026-03-08 54.70% 69.59% +14.89%
3 2026-03-04 — 54.70% —

Full EPSS history (48 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-4993

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2018-4993

Affected software / configurations for CVE-2018-4993

Vendor Product Version Raw CPE
adobe acrobat_dc >= 15.006.30060, <= 15.006.30417 cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:classic:*:*:*
adobe acrobat_dc >= 15.008.20082, <= 18.011.20038 cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*
adobe acrobat_dc >= 17.011.30059, <= 17.011.30079 cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:classic:*:*:*
adobe acrobat_reader_dc >= 15.006.30060, <= 15.006.30417 cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:classic:*:*:*
adobe acrobat_reader_dc >= 15.008.20082, <= 18.011.20038 cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*
adobe acrobat_reader_dc >= 17.011.30059, <= 17.011.30079 cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:classic:*:*:*

References for CVE-2018-4993

URL Tags
http://www.securityfocus.com/bid/104177 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1040920 Third Party Advisory VDB Entry
https://helpx.adobe.com/security/products/acrobat/apsb18-09.html Patch Vendor Advisory
cvelogic Threat Intelligence