CVE-2025-60685Public exploit

Local code execution via unbounded stat parsing

Published Nov 13, 2025 · Updated Jul 5, 2026

Stack buffer overflow in the sysconf binary of ToToLink A720R firmware 4.1.5cu.614_B20230630 allows local users to execute code. The sub_401EE0 function reads a line from /proc/stat and passes it to sscanf with an unbounded %s conversion targeting a single-byte stack variable, overwriting adjacent memory. Exploitation requires control of /proc/stat or local filesystem write access; successful memory corruption can execute code in the sysconf process context.

CVSS severity5.1
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in the sysconf binary of ToToLink A720R firmware 4.1.5cu.614_B20230630 allows local users to execute code. The sub_401EE0 function reads a line from /proc/stat and passes it to sscanf with an unbounded %s conversion targeting a single-byte stack variable, overwriting adjacent memory. Exploitation requires control of /proc/stat or local filesystem write access; successful memory corruption can execute code in the sysconf process context.

The record

CVE
CVE-2025-60685
Published
Nov 13, 2025
Updated
Jul 5, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 5, 2026Record 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 vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.1NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow

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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