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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2023-31998

24
FAUCET Score

CVE-2023-31998 is a heap overflow vulnerability affecting Ubiquiti EdgeRouters and Aircubes, allowing an unauthenticated attacker to disrupt the UPnP service. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low attack complexity, leading to a denial of service. While not currently listed on the KEV catalog, a public Proof-of-Concept exploit has been published, and it has garnered significant community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
2.0.9CPE matchmatch criteria
cpe:2.3:o:ui:edgemax_edgerouter_firmware:2.0.9:*:*:*:*:*:*:*
< 2.8.9CPE matchmatch criteria
cpe:2.3:o:ui:aircube_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.80%
Probability of exploitation in next 30 days
EPSS Percentile
52.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0080 is in the 28th percentile among its peer group of 51,485 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

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

community.ui.com / releases/Security-Advisory-Bulletin-033-033/17f7c7c0-830b-4625-a2ee-e90e514e7b0f
PatchVendor Advisory