CVE-2025-1852Network attack vector

Remote memory corruption via unbounded password decoding

Published Mar 3, 2025 · Updated Mar 3, 2025

Buffer overflow in TOTOLINK EX1800T 9.1.0cu.2112_B20220316 allows remote attackers to corrupt memory through a crafted password. In /cgi-bin/cstecgi.cgi, loginAuth passes the attacker-controlled password parameter to urldecode without enforcing a safe input bound. VulDB scores the attack as requiring low privileges, while NVD scores it as unauthenticated; public evidence establishes neither code execution nor a specific crash mode.

CVSS severity8.7
High
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in TOTOLINK EX1800T 9.1.0cu.2112_B20220316 allows remote attackers to corrupt memory through a crafted password. In /cgi-bin/cstecgi.cgi, loginAuth passes the attacker-controlled password parameter to urldecode without enforcing a safe input bound. VulDB scores the attack as requiring low privileges, while NVD scores it as unauthenticated; public evidence establishes neither code execution nor a specific crash mode.

The record

CVE
CVE-2025-1852
Published
Mar 3, 2025
Updated
Mar 3, 2025
Vendor
TOTOLINK
Product
EX1800T
Classifications
CWE-119, CWE-120, T1190
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 3, 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=9.1.0cu.2112_B20220316

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

TOTOLINK · EX1800Tversion=9.1.0cu.2112_B20220316

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8VulDB CNACVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.0VulDB CNAAV:N/AC:L/Au:S/C:C/I:C/A:C
8.8VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

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')
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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