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CVE-2026-34858

18
FAUCET Score

CVE-2026-34858 is a use-after-free (UAF) vulnerability in the communication module that impacts product availability. The vulnerability requires local access to exploit, high privilege escalation, and difficult attack conditions, resulting in a CVSS v3.1 base score of 4.1 (MEDIUM severity). Attack success is limited to availability impacts with no confidentiality or integrity compromise. The vulnerability demonstrates minimal exploitation activity, with an EPSS score of 0.000060 indicating very low probability of real-world exploitation and no public exploit code availability documented. The vulnerability is not listed on the CISA Known Exploited Vulnerabilities catalog and shows no active threat community attention, suggesting this remains a low-priority remediation concern relative to higher-severity threats in the current threat landscape.

Impacted Technologies

VendorProductVersion(s)CPE
5.1.0CPE matchmatch criteria
cpe:2.3:o:huawei:harmonyos:5.1.0:*:*:*:*:*:*:*
5.1.1CPE matchmatch criteria
cpe:2.3:o:huawei:harmonyos:5.1.1:*:*:*:*:*:*:*
6.0.0CPE matchmatch criteria
cpe:2.3:o:huawei:harmonyos:6.0.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.1MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
0.5
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.07%
Probability of exploitation in next 30 days
EPSS Percentile
0.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0007 is in the 6th percentile among its peer group of 418 CVEs.

Social Chatter

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

consumer.huawei.com / en/support/bulletin/2026/4
Vendor Advisory
consumer.huawei.com / en/support/bulletinvision/2026/4
Vendor Advisory
consumer.huawei.com / en/support/bulletinwearables/2026/4
Vendor Advisory