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CVE-2016-6563· NVD / CVE Program· CNA certcc

D-Link DIR routers contain a stack-based buffer overflow in the HNAP Login action

Processing malformed SOAP messages when performing the HNAP Login action causes a buffer overflow in the stack in some D-Link DIR routers. The vulnerable XML fields within the SOAP body are: Action, Username, LoginPassword, and Captcha. The following products are affected: DIR-823, DIR-822, DIR-818L(W), DIR-895L, DIR-890L, DIR-885L, DIR-880L, DIR-868L, and DIR-850L.

CriticalCVSS 9.8 · v3.0—Weaponized No fix recorded
Published
Jul 13, 2018
Updated
Jun 16, 2026
EPSS
79.7% · 100th percentile
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Action score

63

This week

Don’t wait for the next maintenance window.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
24 / 30 · 79.7%

Affected systems

VendorProduct
dlinkdir-823 firmware
dlinkdir-823
dlinkdir-822 firmware
dlinkdir-822
dlinkdir-818l\(w\) firmware
dlinkdir-818l\(w\)
dlinkdir-895l firmware
dlinkdir-895l
dlinkdir-890l firmware
dlinkdir-890l
dlinkdir-885l firmware
dlinkdir-885l

and 6 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • dlink dir-818l(w) firmwareall versions
  • dlink dir-822 firmwareall versions
  • dlink dir-823 firmwareall versions
  • dlink dir-850l firmwareall versions
  • dlink dir-868l firmwareall versions
  • dlink dir-880l firmwareall versions
  • dlink dir-885l firmwareall versions
  • dlink dir-890l firmwareall versions
  • dlink dir-895l firmwareall versions

Versions reported by the vendor

Affected version ranges reported by the assigning authority (certcc). Independent of NVD's CPE analysis and usually ahead of it.

  • D-Link DIR-818L(W)

    • N/Aunknown

  • D-Link DIR-822

    • N/Aunknown

  • D-Link DIR-823

    • N/Aunknown

  • D-Link DIR-850L

    • N/Aunknown

  • D-Link DIR-868L

    • N/Aunknown

  • D-Link DIR-880L

    • N/Aunknown

  • D-Link DIR-885L

    • N/Aunknown

  • D-Link DIR-890L

    • N/Aunknown

  • D-Link DIR-895L

    • N/Aunknown

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1
  • Exploit-DB entry ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entryremote2016-11-21
Metasploit moduleexploit/linux/http/dlink_hnap_login_bofDlink DIR Routers Unauthenticated HNAP Login Stack Buffer Overflowexploit2016-11-07

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Metasploit-614 d
  2. First PoC-600 d
  3. Published
  4. TodaySep 30, 2026+3001 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-121 · Stack-based Buffer Overflow

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records