CVE-2025-7921Network attack vector

Unauthenticated code execution via stack buffer overflow

Published Jul 21, 2025 · Updated Jul 21, 2025

Stack-based buffer overflow in Askey RTF8207W and RTF8217 before R82XXR250718 allows unauthenticated remote attackers to execute arbitrary code. TWCERT/CC has not disclosed the affected component, request field, or copying operation that overruns the stack buffer. No authentication or user interaction is required; successful exploitation can redirect execution and compromise the gateway.

CVSS severity9.3
Critical
EPSS probability0.82%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Askey RTF8207W and RTF8217 before R82XXR250718 allows unauthenticated remote attackers to execute arbitrary code. TWCERT/CC has not disclosed the affected component, request field, or copying operation that overruns the stack buffer. No authentication or user interaction is required; successful exploitation can redirect execution and compromise the gateway.

The record

CVE
CVE-2025-7921
Published
Jul 21, 2025
Updated
Jul 21, 2025
Vendor
Askey Computer Corporation
Product
RTF8217
Classifications
CWE-121, CAPEC-100, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 21, 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=0 <R82XXR250718

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Askey Computer Corporation · RTF8217version=0 <R82XXR250718
Askey Computer Corporation · RTF8207Wversion=0 <R82XXR250718

Published CVSS scores

9.3TWCERT/CCCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8TWCERT/CCCVSS: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

CWE-121Stack-based Buffer Overflow
CAPEC-100Overflow Buffers
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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