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  4. CVE 2026 86509 d link dir 895l udhcpcd serverpacketc sendack
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Back to active CVEs
Critical · CVSS 9.6CVE-2026-86509

D-Link DIR-895L udhcpcd serverpacket.c sendACK stack-based overflowCVE-2026-86509

Answer in brief

CVE-2026-86509 records a Critical severity (CVSS 9.6) vulnerability in D-Link DIR-895L udhcpcd serverpacket.c sendACK stack-based overflow. The current sources do not mark it as known exploited. The current feed maps D-Link/DIR-895L (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 8, 2026Updated Sep 11, 2026Source checked Oct 25, 2026First seen by HOL Sep 8, 2026Material review Sep 11, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.6
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 9.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps D-Link/DIR-895L (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
D-Link/DIR-895LgenericA1_102b07Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for D-Link/DIR-895L.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Sep 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 11, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 8, 2026

Sources and claim methodology

  • Source referencetzh00203.notion.site
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencedlink.com
Upstream source description

A flaw has been found in D-Link DIR-895L A1_102b07. This impacts the function sendOffer/sendACK of the file udhcpcd/serverpacket.c of the component udhcpcd. This manipulation causes stack-based buffer overflow. The attack can only be done within the local network. The exploit has been published and may be used.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-121, CWE-119
Source
CVE List V5
Source checked
Oct 25, 2026
References
6 linked sources
Open source record