CVE-2026-7420Public exploitNetwork attack vector

Authenticated denial of service via unchecked strcpy

Published Apr 29, 2026 · Updated Apr 29, 2026

Buffer overflow in UTT HiPER 1250GW 3.2.7-210907-180535 and earlier allows remote authenticated users to crash the router. The ConfigAdvideo handler passes the Profile input to strcpy without checking its length, overflowing the destination associated with the selected instance. Administrative HTTP Digest credentials are required, and the published proof of concept demonstrates denial of service rather than code execution.

CVSS severity8.8
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in UTT HiPER 1250GW 3.2.7-210907-180535 and earlier allows remote authenticated users to crash the router. The ConfigAdvideo handler passes the Profile input to strcpy without checking its length, overflowing the destination associated with the selected instance. Administrative HTTP Digest credentials are required, and the published proof of concept demonstrates denial of service rather than code execution.

The record

CVE
CVE-2026-7420
Published
Apr 29, 2026
Updated
Apr 29, 2026
Vendor
Shanghai Aitai Technology Co., Ltd.
Product
HiPER 1250GW
Classifications
CWE-119, CWE-120, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 29, 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

7.4VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
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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