CVE-2026-3815Public exploitNetwork attack vector

Authenticated router crash via unbounded senderEmail copy

Published Mar 9, 2026 · Updated Mar 9, 2026

Classic buffer overflow in UTT HiPER 810G 1.7.7-1711 allows remote authenticated users to crash the router via a crafted HTTP request. The /goform/formApMail handler passes an oversized senderEmail value to strcpy without checking the destination buffer's capacity. Access requires authenticated management-interface credentials, and the published proof of concept demonstrates denial of service rather than code execution.

CVSS severity8.8
High
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Classic buffer overflow in UTT HiPER 810G 1.7.7-1711 allows remote authenticated users to crash the router via a crafted HTTP request. The /goform/formApMail handler passes an oversized senderEmail value to strcpy without checking the destination buffer's capacity. Access requires authenticated management-interface credentials, and the published proof of concept demonstrates denial of service rather than code execution.

The record

CVE
CVE-2026-3815
Published
Mar 9, 2026
Updated
Mar 9, 2026
Vendor
Shanghai Aitai Technology Co., Ltd.
Product
HiPER 810G
Classifications
CWE-119, CWE-120, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 9, 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=1.7.7-1711

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shanghai Aitai Technology Co., Ltd. · HiPER 810Gversion=1.7.7-1711

Published CVSS scores

9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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

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 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')
T1190Exploit Public-Facing Application

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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