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CVE-2017-3808

20
FAUCET Score

CVE-2017-3808 is a denial-of-service vulnerability in Cisco Unified Communications Manager (Cisco Unified CM) affecting versions prior to 10.5.2.14900-16, 11.0.1.23900-5, and 11.5.1.12900-2. An unauthenticated, remote attacker can exploit insufficient rate limiting in the SIP UDP throttling process by sending a high volume of SIP messages, causing the device to unexpectedly reload and restart. This vulnerability has a CVSS v3.0 score of 7.5 (HIGH), indicating a network-based attack with low complexity and high impact on availability. While there is no known active exploitation or public exploit code, the vulnerability has garnered some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
10.0\(1.10000.12\)CPE matchmatch criteria
cpe:2.3:a:cisco:unified_communications_manager:10.0\(1.10000.12\):*:*:*:*:*:*:*
10.0_baseCPE matchmatch criteria
cpe:2.3:a:cisco:unified_communications_manager:10.0_base:*:*:*:*:*:*:*
10.5\(0.98000.88\)CPE matchmatch criteria
cpe:2.3:a:cisco:unified_communications_manager:10.5\(0.98000.88\):*:*:*:*:*:*:*
10.5\(1.98991.13\)CPE matchmatch criteria
cpe:2.3:a:cisco:unified_communications_manager:10.5\(1.98991.13\):*:*:*:*:*:*:*
10.5\(1.99995.9\)CPE matchmatch criteria
cpe:2.3:a:cisco:unified_communications_manager:10.5\(1.99995.9\):*:*:*:*:*:*:*

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
2.48%
Probability of exploitation in next 30 days
EPSS Percentile
82.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0248 is in the 70th 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

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-ucm
Vendor Advisory
securityfocus.com / bid/97922
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038318