Totolink A720R 4.1.5cu.614_B20230630 /proc/stat sub_401EE0 stack-based overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.8$0-$5k0.00

Summaryinfo

A vulnerability has been found in Totolink A720R 4.1.5cu.614_B20230630 and classified as critical. Affected by this issue is the function sub_401EE0 of the file /proc/stat. This manipulation causes stack-based overflow. This vulnerability is tracked as CVE-2025-60685. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Totolink A720R 4.1.5cu.614_B20230630. It has been declared as critical. Affected by this vulnerability is the function sub_401EE0 of the file /proc/stat. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A stack buffer overflow exists in the ToToLink A720R Router firmware V4.1.5cu.614_B20230630 within the sysconf binary (sub_401EE0 function). The binary reads the /proc/stat file using fgets() into a local buffer and subsequently parses the line using sscanf() into a single-byte variable with the %s format specifier. Maliciously crafted /proc/stat content can overwrite adjacent stack memory, potentially allowing an attacker with filesystem write privileges to execute arbitrary code on the device.

This vulnerability is known as CVE-2025-60685 since 09/26/2025. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/13/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.8

VulDB Base Score: 8.8
VulDB Temp Score: 8.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

09/26/2025 CVE reserved
11/13/2025 +48 days Advisory disclosed
11/13/2025 +0 days VulDB entry created
11/13/2025 +0 days VulDB entry last update

Sourcesinfo

Vendor: totolink.net

Status: Not defined

CVE: CVE-2025-60685 (🔒)
GCVE (CVE): GCVE-0-2025-60685
GCVE (VulDB): GCVE-100-332377

Entryinfo

Created: 11/13/2025 17:34
Changes: 11/13/2025 17:34 (53)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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