Threat Intelligence / CVE / CVE-2016-5681

CVE-2016-5681 — D-link Dir-880l Firmware

CVSS v3.1 9.8 (CRITICAL) · EPSS 11.9% (higher than 95.5% of all scored CVEs) · Priority 10/10 · Published 2016-08-25

As of 2024-08-06, CVE-2016-5681 is a CRITICAL-severity vulnerability in D-link Dir-880l Firmware, CVSS v3.1 9.8, EPSS 11.9% (95.5th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2016-5681, most recently “AryStinger (Ary-Attack) Botnet Compromises 4,000+ Legacy D-Link/RTL819X Routers and NAS for Global Attack Proxy Infrastructure (CVE-2013-3307, CVE-2016-5681, CVE-2025-11837)”.

Last updated: 2024-08-06

What is CVE-2016-5681?

Stack-based buffer overflow in dws/api/Login on D-Link DIR-850L B1 2.07 before 2.07WWB05, DIR-817 Ax, DIR-818LW Bx before 2.05b03beta03, DIR-822 C1 3.01 before 3.01WWb02, DIR-823 A1 1.00 before 1.00WWb05, DIR-895L A1 1.11 before 1.11WWb04, DIR-890L A1 1.09 before 1.09b14, DIR-885L A1 1.11 before 1.11WWb07, DIR-880L A1 1.07 before 1.07WWb08, DIR-868L B1 2.03 before 2.03WWb01, and DIR-868L C1 3.00 before 3.00WWb01 devices allows remote attackers to execute arbitrary code via a long session cookie.

The record classifies CVE-2016-5681 under weakness class CWE-119. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 21 affected-product entries are recorded, across 2 vendors, listed below. The identifier was first published 3671 days ago.

Severity and exploitation probability

CVSS v3.1 base score: 9.8 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (FIRST): 11.9% probability of exploitation in the next 30 days, higher than 95.5% of all scored CVEs
CISA KEV: Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority: 10/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published: 2016-08-25, last modified 2024-08-06

Is CVE-2016-5681 being exploited?

Weaponised exploit code for CVE-2016-5681 is publicly available. 1 public proof-of-concept repository is tracked for this identifier.

trickest/cve (trickest)

Affected products and versions

Dlink: Dir-868l Firmware, Dir-868l b1, Dir-822 Firmware 3.01, Dir-822 a1, Dir-880l a1, Dir-850l b1, Dir-895l a1, Dir-817l(w) ax, Dir-818l(w) ax, Dir-890l a1, Dir-823 a1, Dir-885l a1, Dir-868l c1
D-link: Dir-880l Firmware, Dir-850l Firmare, Dir-895l Firmware, Dir-817l(w) Firmware, Dir-818l(w) Firmware, Dir-890l Firmware, Dir-823 Firmware, Dir-885l Firmware

How to fix CVE-2016-5681

Vendor advisory: http://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10063. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2016-5681

1 tracked threat in the Threadlinqs corpus references CVE-2016-5681, either in the campaign’s CVE list or as an indicator on the campaign record.

AryStinger (Ary-Attack) Botnet Compromises 4,000+ Legacy D-Link/RTL819X Routers and NAS for Global Attack Proxy Infrastructure (CVE-2013-3307, CVE-2016-5681, CVE-2025-11837) — HIGH · 2026-06-21

Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-06-22. This product uses the NVD API but is not endorsed or certified by the NVD.

Full detection coverage & IOCs for threats exploiting CVE-2016-5681 are available via the Threadlinqs MCP server (Purple tier). View plans →

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