VulnSocial

CVE-2026-6521Disclosure(wireshark / wireshark)

LOWCVSS 5.5 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

OpenFlow v5 protocol dissector infinite loops in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service

wireshark CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Exploit / PoC references
Vendor / third-party advisories
Weakness type (CWE)
CWE-835

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • wireshark

Threat summary

  • 4 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 4 signals
  • Disclosure: 4 classified signals
  • Peaked 1d ago at 3 mentions (2026-04-30); latest day: 1
  • 4 total mentions across 2 days

Affected systems

Vendors
wireshark
Products
wireshark

Deep dive

Activity timeline4 mentions / 2d
01223Mentions · 2026-04-30: 3Mentions · 2026-05-30: 1Technical Details · 2026-04-30: 3Technical Details · 2026-05-30: 104-3005-30
Signal classification1 categories
Disclosure
4100.0%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-04-303
Disclosure3
2026-05-301
Disclosure1
Full discourse4 posts
  • Lyrie.ai@lyrie_ai
    Disclosure

    Five dissectors trigger infinite loops when processing malformed packets: SMB2 (CVE-2026-5407) — Infinite loop via malformed SMB2 traffic OpenFlow v5/v6 (CVE-2026-6521, CVE-2026-6520) — Flow table parsing hangs DLMS/COSEM (CVE-2026-6536) — Meter reading protocol loops…

    Post summary

    The text announces four CVEs (2026‑5407, 2026‑6521, 2026‑6520, and 2026‑6536), describing the vulnerabilities as infinite loops or hangs triggered by malformed packets.

    1000047
    232 followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-6521 OpenFlow v5 Protocol Dissector Denial of Service in Wireshark 4.6.0-4.6.4 and 4.4.0-4.4.14 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-6521

    Post summary

    The post announces a denial‑of‑service flaw in the OpenFlow v5 Protocol Dissector of specific Wireshark releases, referencing a vulnerability entry. No PoC, exploit, or patch details are provided.

    0000031
    4.0K followersView on X
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-6521 OpenFlow v5 protocol dissector infinite loops in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service https://www.cve.org/CVERecord?id=CVE-2026-6521 ----- Traducción: CVE-2026-6521 Descodificador del protocolo OpenFlow v5 bucles infinit… http://infoflow.cloud`

    Post summary

    The tweet announces CVE‑2026‑6521, detailing a denial‑of‑service flaw in Wireshark’s OpenFlow v5 dissector that causes infinite loops in specific versions.

    0000020
    74 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-6521 OpenFlow v5 protocol dissector infinite loops in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service https://www.cve.org/CVERecord?id=CVE-2026-6521

    Post summary

    The statement announces CVE-2026-6521—a denial‑of‑service flaw in Wireshark’s OpenFlow v5 dissector—without providing a PoC, exploit code, or patch information.

    00000120
    57.3K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appwiresharkwireshark---

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