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CVE-2018-12856

22
FAUCET Score

CVE-2018-12856 is an out-of-bounds read vulnerability affecting Adobe Acrobat and Reader across multiple versions on Windows and macOS. This medium-severity vulnerability, with a CVSS score of 6.5, can be exploited remotely with user interaction (e.g., opening a malicious PDF) and could lead to information disclosure. While no public exploit code or active exploitation has been observed, Adobe has released security updates to address this issue, and it has received some community and media attention.

Impacted Technologies

VendorProductVersion(s)CPE
>= 15.006.30060, <= 15.006.30452CPE matchmatch criteria
cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:classic:*:*:*
>= 15.008.20082, <= 18.011.20063CPE matchmatch criteria
cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*
>= 17.011.30059, <= 17.011.30102CPE matchmatch criteria
cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:classic:*:*:*
>= 15.006.30060, <= 15.006.30452CPE matchmatch criteria
cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:classic:*:*:*
>= 15.008.20082, <= 18.011.20063CPE matchmatch criteria
cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
6.20%
Probability of exploitation in next 30 days
EPSS Percentile
92.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0620 is in the 97th percentile among its peer group of 26,236 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

adobepatch availablevia nvd_reference
View patch

References

helpx.adobe.com / security/products/acrobat/apsb18-30.html
PatchVendor Advisory
securityfocus.com / bid/105439
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041809
Third Party AdvisoryVDB Entry