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CVE-2019-9183

20
FAUCET Score

CVE-2019-9183 is a buffer overflow vulnerability affecting Contiki-NG (through 4.3) and Contiki (through 3.0) due to an integer underflow during 6LoWPAN fragment processing. An unauthenticated attacker can exploit this remotely by sending a crafted 6LoWPAN frame, leading to a denial-of-service condition by crashing the application. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable with no user interaction required. There is no known public exploit code, active exploitation, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.3CPE matchmatch criteria
cpe:2.3:o:contiki-ng:contiki-ng:*:*:*:*:*:*:*:*
<= 3.0CPE matchmatch criteria
cpe:2.3:o:contiki-os:contiki:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.25%
Probability of exploitation in next 30 days
EPSS Percentile
81.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0226 is in the 66th percentile among its peer group of 51,553 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

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)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / contiki-ng/contiki-ng/pull/972
PatchThird Party Advisory
github.com / contiki-ng/contiki-ng/releases/tag/release%2Fv4.4
Release NotesThird Party Advisory
usenix.org / system/files/sec20summer_clements_prepub.pdf
Technical DescriptionThird Party Advisory