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CVE-2017-17704

24
FAUCET Score

CVE-2017-17704 describes a critical door-unlocking vulnerability affecting Software House iStar Ultra devices up to version 6.5.2.20569 when used with the IP-ACM Ethernet Door Module. The issue stems from the use of a fixed AES key and IV for encrypting communications, enabling replay and forgery attacks due to a lack of proper authentication. With a CVSS score of 7.4 (HIGH), this vulnerability has a network attack vector and high impact on integrity and availability, allowing an unauthenticated attacker to unlock doors and potentially disrupt operations. The attack complexity is rated as high, indicating some specialized conditions or knowledge are required. There is no evidence of active exploitation, nor is public exploit code available in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal, suggesting low public awareness.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.5.2.20569CPE matchmatch criteria
cpe:2.3:o:swhouse:istar_ultra_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.4HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.00%
Probability of exploitation in next 30 days
EPSS Percentile
59.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0100 is in the 24th percentile among its peer group of 8,915 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 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

Remediation records are not available for this CVE.

References

systemoverlord.com / 2017/12/18/cve-2017-17704-broken-cryptography-in-istar-ultra-ip-acm-by-software-house.html
Third Party Advisory