CVE-2025-29635Known exploitationPublic exploitNetwork attack vector

Authenticated command execution via unsanitized macaddr input

Published Mar 25, 2025 · Updated Apr 25, 2026

Command injection in D-Link DIR-823X firmware 240126 and 240802 allows remote authenticated users to execute arbitrary commands. The set_prohibiting handler copies the untrusted macaddr value into a command buffer with snprintf and passes it to system() without neutralizing shell metacharacters. The original disclosure requires an authorized session, but Akamai later observed exploit requests without tokens triggering the same system() path.

CVSS severity8.8
High
EPSS probability87.94%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in D-Link DIR-823X firmware 240126 and 240802 allows remote authenticated users to execute arbitrary commands. The set_prohibiting handler copies the untrusted macaddr value into a command buffer with snprintf and passes it to system() without neutralizing shell metacharacters. The original disclosure requires an authorized session, but Akamai later observed exploit requests without tokens triggering the same system() path.

The record

CVE
CVE-2025-29635
Published
Mar 25, 2025
Updated
Apr 25, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-77, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 1, 2026Exploitation reportedAkamai honeypot exploitation attempts
  3. Mar 1, 2026Exploitation reportedMirai tuxnokill botnet campaign
  4. Apr 25, 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 vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

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 exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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