CVE-2026-82691Public exploitNetwork attack vector

Authenticated command execution via unsanitized UPS IP

Published Aug 31, 2026 · Updated Sep 2, 2026

OS command injection in D-Link DNS-320L, DNS-327L, DNS-340L, and DNS-345 firmware allows remote authenticated users to run shell commands. The GUI_ups_add and GUI_ups_slave_setting branches concatenate the f_ups_ip POST value into shell strings passed to UPS_Setting without neutralizing metacharacters. Authenticated web-management access exposes the UPS interface; injected commands can read or alter stored data and interrupt storage services.

CVSS severity8.8
High
EPSS probability2.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in D-Link DNS-320L, DNS-327L, DNS-340L, and DNS-345 firmware allows remote authenticated users to run shell commands. The GUI_ups_add and GUI_ups_slave_setting branches concatenate the f_ups_ip POST value into shell strings passed to UPS_Setting without neutralizing metacharacters. Authenticated web-management access exposes the UPS interface; injected commands can read or alter stored data and interrupt storage services.

The record

CVE
CVE-2026-82691
Published
Aug 31, 2026
Updated
Sep 2, 2026
Vendor
D-Link
Product
DNS-320L
Classifications
CWE-77, CWE-78, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 2, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=20260717

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

D-Link · DNS-320Lversion=20260717
D-Link · DNS-340Lversion=20260717
D-Link · DNS-345version=20260717
D-Link · DNS-327Lversion=20260717

Published CVSS scores

8.3VulDB CNAAV:N/AC:L/Au:M/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
8.8Public technical reportCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.4VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
9.1VulDB CNACVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
9.1VulDB CNACVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Command Injection
CWE-78OS Command Injection
T1059.004Command and Scripting Interpreter: Unix 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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