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CVE-2021-38363

25
FAUCET Score

CVE-2021-38363 describes a high-severity vulnerability in ONOS 2.5.1, specifically within the IntentManager component. An unhandled exception during the installation of a requested intent causes the intent to persist indefinitely in memory, preventing its removal by users or the cleanup process. With a CVSS score of 7.5, this vulnerability can be exploited remotely with low attack complexity, leading to high integrity impact, though confidentiality and availability are not directly affected. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.5.1CPE matchmatch criteria
cpe:2.3:a:opennetworking:onos:2.5.1:*:*:*:*:*:*:*

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:H/A:N

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

Exploit Intelligence

EPSS Score
0.65%
Probability of exploitation in next 30 days
EPSS Percentile
47.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0065 is in the 24th percentile among its peer group of 51,553 CVEs.

Social Chatter

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

Remediation records are not available for this CVE.

References

opennetworking.org / onos
Product
usenix.org / system/files/sec23fall-prepub-285_kim-jiwon.pdf
ExploitTechnical DescriptionThird Party Advisory