No exploitation reportedFix available

CVE-2017-6779

Q: Is CVE-2017-6779 actively exploited?

Active exploitation of CVE-2017-6779 has not been confirmed. Its EPSS score was 2.0% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2017-6779?

CVE-2017-6779 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2018-06-07
Fixed in11.5\(1\)su3 · 11.0\(1a\)su4 · 10.5\(2\)su5
WeaknessCWE-399 · CWE-400

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Multiple Cisco products are affected by a vulnerability in local file management for certain system log files of Cisco collaboration products that could allow an unauthenticated, remote attacker to cause high disk utilization, resulting in a denial of service (DoS) condition. The vulnerability occurs because a certain system log file does not have a maximum size restriction. Therefore, the file is allowed to consume the majority of available disk space on the appliance. An attacker could exploit this vulnerability by sending crafted remote connection requests to the appliance. Successful exploitation could allow the attacker to increase the size of a system log file so that it consumes most of the disk space. The lack of available disk space could lead to a DoS condition in which the application functions could operate abnormally, making the appliance unstable. This vulnerability affects the following Cisco Voice Operating System (VOS)-based products: Emergency Responder, Finesse, Hosted Collaboration Mediation Fulfillment, MediaSense, Prime License Manager, SocialMiner, Unified Communications Manager (UCM), Unified Communications Manager IM and Presence Service (IM&P - earlier releases were known as Cisco Unified Presence), Unified Communication Manager Session Management Edition (SME), Unified Contact Center Express (UCCx), Unified Intelligence Center (UIC), Unity Connection, Virtualized Voice Browser. This vulnerability also affects Prime Collaboration Assurance and Prime Collaboration Provisioning. Cisco Bug IDs: CSCvd10872, CSCvf64322, CSCvf64332, CSCvi29538, CSCvi29543, CSCvi29544, CSCvi29546, CSCvi29556, CSCvi29571, CSCvi31738, CSCvi31741, CSCvi31762, CSCvi31807, CSCvi31818, CSCvi31823.

Timeline

dates in UTC

2018-06-0712:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-6779?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-6779?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Cisco unified communications manager

Branch	Affected	Fixed in	Source
11.5	≥ 11.5, < 11.5\(1\)su3	11.5\(1\)su3	NVD
11.0	≥ 11.0, < 11.0\(1a\)su4	11.0\(1a\)su4	NVD
10.x	≥ 10.0, < 10.5\(2\)su5	10.5\(2\)su5	NVD
10.5	= 10.5\(2.10000.5\)	no fix published	NVD
11.0	= 11.0\(1.10000.10\)	no fix published	NVD
11.5	= 11.5\(1.10000.6\)	no fix published	NVD
12.0	= 12.0	no fix published	NVD

Cisco emergency responder

Branch	Affected	Fixed in	Source
12.0	≥ 12.0, < 12.0su1	12.0su1	NVD
11.x	≥ 11.0, < 11.5\(4\)	11.5\(4\)	NVD
10.5	≥ 10.5, < 10.5\(1a\)	10.5\(1a\)	NVD
11.0	= 11.0\(1.10000.10\)	no fix published	NVD

Cisco unity connection

Branch	Affected	Fixed in	Source
11.x	≥ 11.0, < 11.5.1su3	11.5.1su3	NVD
10.5	≥ 10.5, < 10.5su5	10.5su5	NVD
9.5	= 9.5\(0.9\)tt0	no fix published	NVD
12.0	= 12.0	no fix published	NVD

10 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Cisco unified communications manager to 11.5\(1\)su3 · 11.0\(1a\)su4 · 10.5\(2\)su5

Advisories and patches

tools.cisco.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2024-11-29
OpenCVESSVC decisionnone—
NVDCVSS 3.07.5read 2026-10-23
NVDCVSS 2.07.8read 2026-10-23
CNAweakness (CWE)CWE-399read 2026-10-23
NVDweakness (CWE)CWE-400read 2026-10-23
FIRST EPSSEPSS score2.0 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2018-06-07
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2017-6779?

Is CVE-2017-6779 actively exploited?

Active exploitation of CVE-2017-6779 has not been confirmed. Its EPSS score was 2.0% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-6779?

CVE-2017-6779 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Hear about the next vulnerability in your software

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this product CISA KEV additions, October 2026 Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database