CVE-2025-8956Public exploitNetwork attack vector

Authenticated command execution via unsanitized environment variables

Published Aug 14, 2025 · Updated Aug 14, 2025

Command injection in D-Link DIR-818L firmware 1.05B01 allows remote authenticated users to execute commands through ssdpcgi. The ssdpcgi path reads attacker-controlled environment variables with getenv, concatenates them with sprintf into an lxmldbc_system command, and passes the result to system without neutralizing shell metacharacters. Low-privileged access to the network interface is required, after which injected commands can open a reverse shell and grant control of the router.

CVSS severity6.3
Medium
EPSS probability19.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in D-Link DIR-818L firmware 1.05B01 allows remote authenticated users to execute commands through ssdpcgi. The ssdpcgi path reads attacker-controlled environment variables with getenv, concatenates them with sprintf into an lxmldbc_system command, and passes the result to system without neutralizing shell metacharacters. Low-privileged access to the network interface is required, after which injected commands can open a reverse shell and grant control of the router.

The record

CVE
CVE-2025-8956
Published
Aug 14, 2025
Updated
Aug 14, 2025
Vendor
D-Link
Product
DIR-818L
Classifications
CWE-77, CWE-74, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 14, 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=1.05B01

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

D-Link · DIR-818Lversion=1.05B01

Published CVSS scores

6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1059.004Unix Shell

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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