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CVE-2017-11309

38
FAUCET Score

CVE-2017-11309 describes a critical buffer overflow vulnerability in the SoftConsole client of Avaya IP Office versions prior to 10.1.1, allowing remote servers to execute arbitrary code through a crafted, long response. With a CVSS score of 9.6 (CRITICAL) and a FAUCET Risk Score of 97/100, this vulnerability is easily exploitable over the network with low attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. While not listed on the KEV catalog or showing active widespread exploitation, public exploit code (EDB-43121) exists, indicating a clear path for adversaries, despite minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 10.1.1CPE matchmatch criteria
cpe:2.3:a:avaya:ip_office:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.6CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
6.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
9.40%
Probability of exploitation in next 30 days
EPSS Percentile
94.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
ExploitDB: EDB-43121 · Nov 5, 2017
This CVE's current EPSS score of 0.0940 is in the 97th percentile among its peer group of 834 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.8 Bluesky, 0.5 Mastodon, and 1.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

downloads.avaya.com / css/P8/documents/101044086
Vendor Advisory
hyp3rlinx.altervista.org / advisories/AVAYA-OFFICE-IP-%28IPO%29-v9.1.0-10.1-SOFT-CONSOLE-REMOTE-BUFFER-OVERFLOW-0DAY.txt
packetstormsecurity.com / files/144883/Avaya-IP-Office-IPO-10.1-Soft-Console-Remote-Buffer-Overflow.html
ExploitThird Party AdvisoryVDB Entry
exploit-db.com / exploits/43121
ExploitThird Party AdvisoryVDB Entry
securityfocus.com / bid/101674
Third Party AdvisoryVDB Entry