CVE-2025-60335Public exploitNetwork attack vector

Unauthenticated service interrupt via unchecked allocation failure

Published Oct 22, 2025 · Updated Oct 22, 2025

NULL pointer dereference in TOTOLINK N600R 4.3.0cu.7866_B20220506 allows remote attackers to interrupt its web service via HTTP. The cstecgi.cgi main function passes attacker-controlled CONTENT_LENGTH to malloc, then calls memset on the returned pointer without checking for allocation failure. An unauthenticated request with an oversized length triggers the dereference, terminating the CGI process and interrupting the router web service.

CVSS severity7.5
High
EPSS probability1.99%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in TOTOLINK N600R 4.3.0cu.7866_B20220506 allows remote attackers to interrupt its web service via HTTP. The cstecgi.cgi main function passes attacker-controlled CONTENT_LENGTH to malloc, then calls memset on the returned pointer without checking for allocation failure. An unauthenticated request with an oversized length triggers the dereference, terminating the CGI process and interrupting the router web service.

The record

CVE
CVE-2025-60335
Published
Oct 22, 2025
Updated
Oct 22, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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