CVE-2026-76004Public exploitNetwork attack vector

Device crash via strcpy of pvid

Published Aug 19, 2026 · Updated Aug 19, 2026

Stack-based buffer overflow in UTT HiPER 1250GW 3.2.7-210907-180535 allows remote authenticated users to crash the device via pvid. In /goform/aspApBasicConfigUrcp, the HTTP handler enters the setApVlanId path and copies the pvid parameter with strcpy into a fixed stack buffer without length validation. Reachability requires access to the web management interface; the public proof of concept sends an authenticated POST request, and public sources describe denial of service rather than code execution.

CVSS severity9.9
Critical
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in UTT HiPER 1250GW 3.2.7-210907-180535 allows remote authenticated users to crash the device via pvid. In /goform/aspApBasicConfigUrcp, the HTTP handler enters the setApVlanId path and copies the pvid parameter with strcpy into a fixed stack buffer without length validation. Reachability requires access to the web management interface; the public proof of concept sends an authenticated POST request, and public sources describe denial of service rather than code execution.

The record

CVE
CVE-2026-76004
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
Shanghai Aitai Technology Co., Ltd.
Product
HiPER 1250GW
Classifications
CWE-121, CWE-119, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.2.7-210907-180535

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shanghai Aitai Technology Co., Ltd. · HiPER 1250GWversion=3.2.7-210907-180535

Published CVSS scores

9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
9.9VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.6VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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