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CVE-2017-12234

58
FAUCET Score

CVE-2017-12234 describes multiple denial-of-service vulnerabilities in Cisco IOS versions 12.4 through 15.6, stemming from improper parsing of crafted Common Industrial Protocol (CIP) packets. An unauthenticated, remote attacker can exploit these flaws by sending specially designed CIP packets, causing affected Cisco devices to reload. This vulnerability carries a high CVSS score of 7.5 due to its network-based attack vector and high impact on availability. Notably, this CVE is listed in CISA's KEV catalog, indicating active exploitation in the wild, despite a lack of public exploit code or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
>= 12.4, <= 15.6CPE matchmatch criteria
cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
7.13%
Probability of exploitation in next 30 days
EPSS Percentile
93.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
Added to KEV · Mar 3, 2022
This CVE's current EPSS score of 0.0713 is in the 89th percentile among its peer group of 51,485 CVEs.

Social Chatter

No social media mentions found for this CVE.

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 (1)

ciscovendor investigatingvia nvd_reference
View patch

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-cip
Vendor Advisory
securityfocus.com / bid/101038
Broken LinkThird Party AdvisoryVDB Entry
securitytracker.com / id/1039459
Broken LinkThird Party AdvisoryVDB Entry