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CVE-2018-1000217

31
FAUCET Score

CVE-2018-1000217 is a critical Use After Free vulnerability (CWE-416) affecting Dave Gamble cJSON versions 1.7.3 and earlier. This flaw can lead to application crashes, data corruption, or even remote code execution, depending on how the cJSON library is integrated into an application. With a CVSS score of 9.8 (CRITICAL), it is easily exploitable over a network with low attack complexity and no user interaction required. While there is no evidence of active exploitation or public exploit code, the vulnerability has garnered significant community discussion, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.7.4CPE matchmatch criteria
cpe:2.3:a:davegamble:cjson:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.75%
Probability of exploitation in next 30 days
EPSS Percentile
75.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0175 is in the 64th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

microsoftpatch availablevia msrc
Product: 16928-17084Fixed in: 1.7.0-2
microsoftpatch availablevia msrc
Product: 16928-16817Fixed in: 1.7.0-2
microsoftpatch availablevia msrc
Product: azl3 libglvnd 1.7.0-2 on Azure Linux 3.0Fixed in: 1.7.0-2

Vendor Advisories (1)

microsoft2018-Aug/CVE-2018-1000217Critical

Dave Gamble cJSON version 1.7.3 and earlier contains a CWE-416: Use After Free vulnerability

Aug 14, 2018

References

github.com / DaveGamble/cJSON/issues/248
ExploitThird Party Advisory