CVE-2025-45835Public exploitNetwork attack vector

Service crash via negative CONTENT_LENGTH dereference

Published May 12, 2025 · Updated May 12, 2025

Null pointer dereference in Netis WF2880 firmware 2.1.40207 allows remote attackers to crash cgitest.cgi via CONTENT_LENGTH. FUN_004904c8 reads attacker-controlled CONTENT_LENGTH through getenv and fails to reject a negative value before dereferencing a resulting null pointer. No authentication or user interaction is required; successful exploitation terminates the CGI process without reported data exposure or modification.

CVSS severity7.5
High
EPSS probability0.47%
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 Netis WF2880 firmware 2.1.40207 allows remote attackers to crash cgitest.cgi via CONTENT_LENGTH. FUN_004904c8 reads attacker-controlled CONTENT_LENGTH through getenv and fails to reject a negative value before dereferencing a resulting null pointer. No authentication or user interaction is required; successful exploitation terminates the CGI process without reported data exposure or modification.

The record

CVE
CVE-2025-45835
Published
May 12, 2025
Updated
May 12, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 12, 2025CVE publishedPublication date reported by the CVE source.
  2. May 12, 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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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
T1499.004Application 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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