CVE-2025-11653Public exploitNetwork attack vector

Authenticated code execution via unchecked NTPServerIP copy

Published Oct 13, 2025 · Updated Oct 13, 2025

Buffer overflow in UTT HiPER 2620G 3.1.0 through 3.1.4 allows remote authenticated users to execute arbitrary code via NTP settings. The /goform/fNTP handler copies an attacker-controlled NTPServerIP value with strcpy into a fixed destination at offset 44 without checking its length. Digest-authenticated administrative access, enabled SntpEnable, a nonempty time_zone, and a nonempty NTPServerIP are required; an oversized value can crash the router or corrupt execution.

CVSS severity8.8
High
EPSS probability0.75%
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 2620G 3.1.0 through 3.1.4 allows remote authenticated users to execute arbitrary code via NTP settings. The /goform/fNTP handler copies an attacker-controlled NTPServerIP value with strcpy into a fixed destination at offset 44 without checking its length. Digest-authenticated administrative access, enabled SntpEnable, a nonempty time_zone, and a nonempty NTPServerIP are required; an oversized value can crash the router or corrupt execution.

The record

CVE
CVE-2025-11653
Published
Oct 13, 2025
Updated
Oct 13, 2025
Vendor
Shanghai Aitai Technology Co., Ltd.
Product
HiPER 2620G
Classifications
CWE-120, CWE-119, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 13, 2025Record 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=3.1.0
  2. Affected versionversion=3.1.1
  3. Affected versionversion=3.1.2
  4. Affected versionversion=3.1.3
  5. Affected versionversion=3.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Shanghai Aitai Technology Co., Ltd. · HiPER 2620Gversion=3.1.0; version=3.1.1; version=3.1.2; version=3.1.3; version=3.1.4

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.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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