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CVE-2017-3861

22
FAUCET Score

CVE-2017-3861 describes multiple buffer overflow vulnerabilities within the EnergyWise module of Cisco IOS and IOS XE software. These flaws allow an unauthenticated, remote attacker to trigger a denial of service (DoS) condition by sending specially crafted IPv4 EnergyWise packets to an affected device. With a CVSS score of 8.6 (HIGH), the vulnerability is easily exploitable over the network with low attack complexity, leading to high availability impact (device reload or buffer overflow). There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
12.2\(33\)sxi4CPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.2\(33\)sxi4:*:*:*:*:*:*:*
12.2\(33\)sxi4aCPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.2\(33\)sxi4a:*:*:*:*:*:*:*
12.2\(33\)sxi5CPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.2\(33\)sxi5:*:*:*:*:*:*:*
12.2\(33\)sxi6CPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.2\(33\)sxi6:*:*:*:*:*:*:*
12.2\(33\)sxi7CPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.2\(33\)sxi7:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.6HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
4.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.78%
Probability of exploitation in next 30 days
EPSS Percentile
84.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0278 is in the 73rd percentile among its peer group of 51,553 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

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-energywise
Vendor Advisory
securityfocus.com / bid/97935
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038313