CVE-2018-18689

21
FAUCET Score

CVE-2018-18689 is a Signature Wrapping vulnerability in the Portable Document Format (PDF) specification, stemming from a lack of clear signature validation procedures. This allows attackers to manipulate /ByteRange and xref data, bypassing signature validation in numerous PDF products including Foxit Reader, PhantomPDF, Nitro Pro, and PDF-XChange Editor. Rated Medium (CVSS 5.3), it has a low attack complexity and can lead to information disclosure (C:L). There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
12.0.20CPE matchmatch criteria
cpe:2.3:a:avanquest:expert_pdf_ultimate:12.0.20:*:*:*:*:*:*:*
9.0.270CPE matchmatch criteria
cpe:2.3:a:avanquest:pdf_experte_ultimate:9.0.270:*:*:*:*:*:*:*
9.1.0CPE matchmatch criteria
cpe:2.3:a:foxitsoftware:foxit_reader:9.1.0:*:*:*:*:*:*:*
9.2.0.9297CPE matchmatch criteria
cpe:2.3:a:foxitsoftware:foxit_reader:9.2.0.9297:*:*:*:*:*:*:*
9.3.0.10826CPE matchmatch criteria
cpe:2.3:a:foxitsoftware:foxit_reader:9.3.0.10826:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.69%
Probability of exploitation in next 30 days
EPSS Percentile
88.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0369 is in the 85th percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.