Skip to content
Noroxi
CVE-2026-34866· NVD / CVE Program· CNA huawei

Out-of-bounds write vulnerability in the WEB module.Impact: Successful exploitation of this vulnerability will affect availability and confi

Out-of-bounds write vulnerability in the WEB module.Impact: Successful exploitation of this vulnerability will affect availability and confidentiality.

MediumCVSS 5.1 · v3.1—No exploit No fix recorded
Published
Apr 13, 2026
Updated
Jun 17, 2026
EPSS
0.1% · 1th percentile
Follow this CVE

Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.

Report tools

JSON

Action score

20

Monitor

Low priority for now.

CVSS
20 / 40 · 5.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · huawei
5.1
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Affected systems

VendorProduct
huaweiharmonyos

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • huawei harmonyos6.0.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (huawei). Independent of NVD's CPE analysis and usually ahead of it.

  • Huawei HarmonyOS

    • 6.0.0affected

Same product

huawei: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-34865Out-of-bounds write vulnerability in the WEB module.Impact: Successful exploitation of this vulnerability will affect availability and confi
    40Plan
  • CVE-2025-54617Stack-based buffer overflow vulnerability in the dms_fwk module.
    39Monitor
  • CVE-2023-44116Vulnerability of access permissions not being strictly verified in the APPWidget module.Successful exploitation of this vulnerability may ca
    39Monitor
  • CVE-2023-44105Vulnerability of permissions not being strictly verified in the window management module.Successful exploitation of this vulnerability may c
    39Monitor
  • CVE-2023-44106API permission management vulnerability in the Fwk-Display module.Successful exploitation of this vulnerability may cause features to perfor
    39Monitor
  • CVE-2023-41294The DP module has a service hijacking vulnerability.Successful exploitation of this vulnerability may affect some Super Device services.
    39Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2024-58106371 days apartBuffer overflow vulnerability in the codec module Impact: Successful exploitation of this vulnerability may affect availability.
    30Monitor
  • CVE-2024-58108371 days apartBuffer overflow vulnerability in the codec module Impact: Successful exploitation of this vulnerability may affect availability.
    30Monitor
  • CVE-2024-58109371 days apartBuffer overflow vulnerability in the codec module Impact: Successful exploitation of this vulnerability may affect availability.
    30Monitor
  • CVE-2024-58110371 days apartBuffer overflow vulnerability in the codec module Impact: Successful exploitation of this vulnerability may affect availability.
    30Monitor
  • CVE-2024-54105487 days apartRead/Write vulnerability in the image decoding module Impact: Successful exploitation of this vulnerability will affect availability.
    30Monitor
  • CVE-2024-56453460 days apartVulnerability of input parameters not being verified during glTF model loading in the 3D engine module Impact: Successful exploitation of th
    22Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
low · data or configuration can be modified
Availability
low · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
Low
Availability impact
Low

Weakness class (CWE)

CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CVSS vector

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

nvd-secondary

Root cause

When data is copied, the source length is not compared with the size of the destination buffer. Excess data overwrites adjacent memory.

The bug in code

The whole CWE-120 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

c
char buf[256];memcpy(buf, pkt->data, pkt->len);

Fixed

c
char buf[256];if (pkt->len > sizeof(buf)) {  return -EINVAL;}memcpy(buf, pkt->data, pkt->len);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records