Analyst readout for executives and security teams
Plain-English summary
CVE-2026-9759 is a Wireshark crash vulnerability in the ROHC protocol dissector. Affected Wireshark versions can be made unavailable, but the provided sources do not indicate data theft, privilege gain, code execution, or active exploitation.
Executive priority
Handle through normal vulnerability management with moderate priority. The business risk is interruption of packet-analysis workflows, not confirmed system takeover. Patch or replace affected Wireshark builds promptly where analysts handle external or untrusted captures.
Technical view
The issue is a NULL pointer dereference, CWE-476, in Wireshark’s ROHC dissector affecting 4.6.0 through 4.6.5 and 4.4.0 through 4.4.15. CVSS 3.1 is 5.5 with local attack vector, low complexity, no privileges, required user interaction, and high availability impact.
Likely exposure
Exposure is most likely on analyst workstations, engineering endpoints, and systems where users run affected Wireshark versions and interact with ROHC-related traffic or captures. The provided CPE data is empty, so asset discovery must rely on installed software inventory.
Exploitation context
The bundle does not show CISA KEV listing or any cited evidence of active exploitation. The CVSS vector indicates user interaction is required and impact is limited to availability. Treat this as a denial-of-service risk, not a confirmed compromise pathway.
Researcher notes
Evidence is limited to the CVE record, Wireshark advisory reference, and GitLab work item reference. The bundle supports ROHC dissector denial of service via NULL pointer dereference, but does not provide exploit maturity, detailed trigger conditions, or patch identifiers.
Mitigation direction
- Inventory installed Wireshark versions across analyst and engineering systems.
- Prioritize affected versions 4.6.0-4.6.5 and 4.4.0-4.4.15.
- Check Wireshark advisory WNPA-SEC-2026-51 for vendor-approved fixed versions.
- Apply vendor guidance before handling untrusted packet captures.
- Reduce unnecessary use of affected Wireshark builds until remediated.
Validation and detection
- Confirm whether endpoints run Wireshark 4.6.0-4.6.5 or 4.4.0-4.4.15.
- Check remediation status against Wireshark advisory WNPA-SEC-2026-51.
- Review security tool inventories for unmanaged Wireshark installations.
- Confirm no operational workflows depend on vulnerable versions.
- Track the referenced GitLab work item for technical clarification.
Public sources used
Based on public source material and reviewed before publication.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-476: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-9759 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H 1.8 3.6 GitLab Vulnerability scoring details
Base CVSS 3.1 score
5.5 MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reserved CVE Program
The CVE ID was reserved by the assigning CNA.
- CVE published CVE Program
The CVE record was published.
- CVE updated CVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 source CVE List V5
- https://www.wireshark.org/security/wnpa-sec-2026-51.html CVE reference, GitLab
- https://gitlab.com/wireshark/wireshark/-/work_items/21243 CVE reference, GitLab
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.