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CVE-2017-1556

22
FAUCET Score

CVE-2017-1556 describes a regular expression denial-of-service (ReDoS) vulnerability affecting IBM API Connect versions 5.0.7.0 through 5.0.7.2. An authenticated attacker can exploit this flaw by submitting a crafted regular expression, leading to system slowdown or unresponsiveness. Rated 6.5 Medium on CVSSv3, this vulnerability has a low attack complexity and requires authentication, but can result in high availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
5.0.7.0CPE matchmatch criteria
cpe:2.3:a:ibm:api_connect:5.0.7.0:*:*:*:*:*:*:*
5.0.7.1CPE matchmatch criteria
cpe:2.3:a:ibm:api_connect:5.0.7.1:*:*:*:*:*:*:*
5.0.7.2CPE matchmatch criteria
cpe:2.3:a:ibm:api_connect:5.0.7.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.46%
Probability of exploitation in next 30 days
EPSS Percentile
70.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0146 is in the 84th percentile among its peer group of 21,958 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

exchange.xforce.ibmcloud.com / vulnerabilities/131546
VDB EntryVendor Advisory
ibm.com / support/docview.wss
Vendor Advisory
securityfocus.com / bid/100831
Third Party AdvisoryVDB Entry