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CVE-2018-0332

24
FAUCET Score

CVE-2018-0332 is a denial-of-service vulnerability affecting Cisco Unified IP Phone software, stemming from a lack of flow-control mechanisms in its Session Initiation Protocol (SIP) ingress packet processing. An unauthenticated, remote attacker can exploit this by sending a high volume of SIP INVITE traffic, leading to service disruption on the targeted phone. With a CVSS score of 7.5 (HIGH), this vulnerability is easily exploitable over the network with low complexity and no user interaction, resulting in high availability impact. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
9.9\(9.99002.1\)CPE matchmatch criteria
cpe:2.3:o:cisco:unified_ip_phone_firmware:9.9\(9.99002.1\):*:*:*:*:*:*:*
9.4\(2\)sr3.1CPE matchmatch criteria
cpe:2.3:o:cisco:ip_phone_firmware:9.4\(2\)sr3.1:*:*:*:*:*:*:*
9.4\(2\)sr4CPE matchmatch criteria
cpe:2.3:o:cisco:ip_phone_firmware:9.4\(2\)sr4:*:*:*:*:*:*:*

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
3.48%
Probability of exploitation in next 30 days
EPSS Percentile
87.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0348 is in the 78th percentile among its peer group of 51,485 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 (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-ip-phone-dos
Vendor Advisory
securityfocus.com / bid/104445
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041074
Third Party AdvisoryVDB Entry