CVE-2025-10547Network attack vector

Unauthenticated code execution via uninitialized CGI variable

Published Oct 3, 2025 · Updated Oct 3, 2025

Memory corruption in DrayOS CGI request processing allows remote attackers to crash Vigor routers or execute code via crafted WebUI requests. A LAN Web Administration script processes HTTP request arguments through an uninitialized variable, corrupting memory and permitting execution hijacking. No authentication is required; WAN reachability requires EasyVPN or remote administration, while LAN-reachable WebUI access remains exposed.

CVSS severity9.8

Critical

EPSS probability0.58%

Next 30 days · Sep 16, 2026

Known exploitationUnconfirmed

Based on sourced intelligence

Hinoki checkNot available

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Summary

What happened

The record

CVE: CVE-2025-10547
Published: Oct 3, 2025
Updated: Oct 3, 2025

Vendor: DrayTek
Product: Vigor2763 Series
Classifications: T1190

Attack vector: network
Privileges: unauthenticated

Timeline

How it unfolded

Oct 3, 2025CVE publishedPublication date reported by the CVE source.
Oct 3, 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.

Affected versionversion=4.5.1

What conditions does exploitation require?

Attack vectornetwork

Required privilegesunauthenticated

What is affected?

DrayTek · Vigor2763 Seriesversion=4.5.1

DrayTek · Vigor2866 LTE Seriesversion=4.5.1

DrayTek · Vigor2865 Seriesversion=4.5.1

DrayTek · Vigor2862 Seriesversion=3.9.9.12

DrayTek · Vigor2926 Seriesversion=3.9.9.12

DrayTek · Vigor2962version=4.4.5.1

DrayTek · Vigor2927 LTE Seriesversion=4.5.1

DrayTek · Vigor2865 LTE Seriesversion=4.5.1

DrayTek · Vigor2135 Seriesversion=4.5.1

DrayTek · Vigor3910version=4.4.3.6

DrayTek · Vigor1000Bversion=4.4.5.1

DrayTek · Vigor2866 Seriesversion=4.5.1

DrayTek · Vigor2927L-5G Seriesversion=4.5.1

DrayTek · Vigor2865L-5G Seriesversion=4.5.1

DrayTek · Vigor2765 Seriesversion=4.5.1

DrayTek · Vigor3912 Seriesversion=4.4.5.1

DrayTek · Vigor2862 LTE Seriesversion=3.9.9.12

DrayTek · Vigor2915 Seriesversion=4.4.6.1

DrayTek · Vigor2927 Seriesversion=4.5.1

DrayTek · Vigor2766 Seriesversion=4.5.1

Published CVSS scores

8.8GitHub Advisory DatabaseCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

Privilegesunauthenticated

Known exploitationUnconfirmed

Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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