Vulnerability report

Active exploitation observed Confirmed confidence In CISA KEV

CVE-2025-29635

DIR-823X Command Injection

D-Link / DIR-823X

Watch CVE-2025-29635 Browse KEV feed
Severity
CVSS 7.2 · High
Confidence
Confirmed
Exploit status
Observed in sensors
EPSS
87.9%
First observed
21 Jun 2026
Last observed
09 Oct 2026

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2025-29635 is a vulnerability affecting D-Link DIR-823X. A command injection vulnerability in D-Link DIR-823X 240126 and 240802 allows an authorized attacker to execute arbitrary commands on remote devices by...

Is it exploited?

Yes. Previdian sensors observed exploitation attempts with confirmed confidence. Listed in CISA KEV. Also confirmed by third-party sources.

Who is affected?

D-Link / DIR-823X.

What should we do?

Patch immediately, validate internet-facing exposure, and monitor for matching requests.

Overview

DIR-823X Command Injection

A command injection vulnerability in D-Link DIR-823X 240126 and 240802 allows an authorized attacker to execute arbitrary commands on remote devices by sending a POST request to /goform/set_prohibiting via the corresponding function, triggering remote command execution.

Published
25 Mar 2025
Exploitation Reported
01 Jun 2026
Attack vector
Remote
Complexity
Low
Privileges
High
User interaction
None

Tags

cisa nuclei_scanner

CVE References

  • CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2025-29635
  • GitHub — mono7s/Dir-823x github.com · CVE Record https://github.com/mono7s/Dir-823x/blob/main/set_prohibiting/set_proh...

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CVE

Recorded 01 Jun 2026

A trusted third party reported exploitation.

Active exploitation observed

Previdian sensor

First observed 07 Aug 2026

Previdian first observed exploitation attempts targeting this vulnerability in our honeypot sensors.

Proof of concept available

Nuclei Templates

Recorded 29 Jun 2026

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

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Source Added
CVE First 2026-06-01 13:23 UTC
CISA 2026-06-02 14:01 UTC
Daily CyberSecurity 2026-06-17 03:20 UTC
The Shadowserver 2026-07-03 00:00 UTC
Previdian Sensors 2026-08-18 09:36 UTC

Operational indicators for this CVE are listed under Detection.

Sensor telemetry

First-party evidence of exploitation activity

Previdian sensors recorded exploitation attempts targeting this vulnerability. The cards and chart show volume, unique attackers, and daily activity.

85

Attempts observed

8

Unique attacker IPs

4

Attacker countries

DE · FI · NL · US

29

Sensors observed

CVE-2025-29635 exploitation attempts over the last 66 days

Daily events observed by Previdian sensors

Updated 10 Oct 2026

0
1
0
1
4
0
0
0
0
0
11
6
26
12
2
0
0
0
6
5
0
0
2
1
0
0
0
0
1
1
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5
0
6 Aug 20 Aug 3 Sep 17 Sep 10 Oct

First observed 21 Jun 2026 · Last observed 09 Oct 2026

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Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
1
3
9

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Virtual patch status

Previdian virtual patch guidance is available for this CVE.

AWS WAF Cloudflare ModSecurity

Attacker IP Indicators

Attacker IP indicators observed · available in Pro and Enterprise.

Sensor-derived attacker IP indicators are available to Pro and Enterprise accounts under Detection and through the Pro API.

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Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/javascript/cves/2025/CVE-2025-29635.yaml 29 Jun 2026

Virtual Patch Detail

Compensating WAF rules for this CVE.

Available

Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to Previdian Enterprise users.

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Risk and context

Severity, weaknesses, and research context

CVSS v3.1

7.2 High

Potential damage if exploited. Separate from whether attackers are using it.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS

87.9%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Improper Neutralization of Special Elements used in a Command ('Command Injection') CWE-77

Recent mention · Daily CyberSecurity

Fortra BoKS Vulnerability Opens Door to Remote Command Injection

A critical Fortra BoKS vulnerability has put privileged access servers at risk across Linux and UNIX fleets. Tracked The post Fortra BoKS Vulnerability Opens Door to Remote Command Injection appeared first on Daily CyberSecurity. Related posts: High-Severity RCE Discovered...

Read full advisory

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

D-Link DIR-823X set_prohibiting - Command Injection

nuclei · Created Unknown

D-Link DIR-823X set_prohibiting - Command Injection

nuclei · Created Unknown

Timeline

From disclosure to observed exploitation

  1. 00:32 UTC

    Virtual patch available

    Compensating WAF rule available to block exploitation

  2. 09:50 UTC

    Observed by Previdian sensors

    Evidence-backed exploitation signal

  3. 00:00 UTC

    KEV confirmed by The Shadowserver

    Exploitation attested by an external source

  4. 04:31 UTC

    Public PoC available

    Public proof-of-concept code published

  5. 04:31 UTC

    Nuclei template available

    Scanner coverage available

  6. 10:03 UTC

    Indicators of compromise added (10)

    Indicators of compromise recorded

  7. 03:20 UTC

    KEV confirmed by Daily CyberSecurity

    Exploitation attested by an external source

  8. 14:01 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  9. 13:23 UTC

    Added to Previdian KEV Feed

    High-confidence, third-party attested exploitation

  10. 00:00 UTC

    CVE published

    Vulnerability disclosed publicly

  11. 00:00 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2025-29635

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2025-29635",
  "confidence": "Confirmed",
  "cvss_score": 7.2,
  "cvss_estimated": false,
  "epss_score": 0.87944,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 85, "sensors": 29 }
}