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CVE-2017-9766

26
FAUCET Score

CVE-2017-9766 describes a denial-of-service vulnerability in Wireshark version 2.2.7, specifically affecting the PROFINET IO dissector. An unauthenticated remote attacker can exploit this by sending specially crafted PROFINET IO data with high recursion depth, leading to stack exhaustion in the dissect_IODWriteReq function. This vulnerability is rated as High severity (CVSS 7.5), requiring no user interaction and resulting in a complete loss of availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.2.7CPE matchmatch criteria
cpe:2.3:a:wireshark:wireshark:2.2.7:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.82%
Probability of exploitation in next 30 days
EPSS Percentile
89.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0382 is in the 80th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (3)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: wireshark
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: wireshark
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: wireshark

Vendor Advisories (1)

redhatCVE-2017-9766Low

wireshark: PROFINET IO data with a high recursion depth can cause stack exhaustion

Jun 19, 2017

References

bugs.wireshark.org / bugzilla/show_bug.cgi
Issue TrackingPatchVendor Advisory
code.wireshark.org / review/gitweb
lists.debian.org / debian-lts-announce/2019/01/msg00010.html
Mailing ListThird Party Advisory
securityfocus.com / bid/99187
Third Party AdvisoryVDB Entry