CVE-2025-8243Public exploitNetwork attack vector

Router crash via oversized devicemac1 POST value

Published Jul 27, 2025 · Updated Jul 28, 2025

Buffer overflow in the TOTOLINK X15 HTTP POST handler 1.0.0-B20230714.1105 allows remote authenticated users to crash the router. The /boafrm/formMapDel route processes an oversized devicemac1 request value without enforcing the destination buffer boundary. The published request includes a sessionCheck token, so exploitation requires a management session and interrupts router service.

CVSS severity8.8
High
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Buffer overflow in the TOTOLINK X15 HTTP POST handler 1.0.0-B20230714.1105 allows remote authenticated users to crash the router. The /boafrm/formMapDel route processes an oversized devicemac1 request value without enforcing the destination buffer boundary. The published request includes a sessionCheck token, so exploitation requires a management session and interrupts router service.

The record

CVE
CVE-2025-8243
Published
Jul 27, 2025
Updated
Jul 28, 2025
Vendor
TOTOLINK
Product
X15
Classifications
CWE-119, CWE-120, CWE-787, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 28, 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=1.0.0-B20230714.1105

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TOTOLINK · X15version=1.0.0-B20230714.1105

Published CVSS scores

8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
CWE-787Out-of-bounds Write
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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