No exploitation reported

CVE-2017-7523

No exploitation reported by the sources we read.

Published2017-07-21
WeaknessCWE-119 · CWE-787

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

Cygwin versions 1.7.2 up to and including 1.8.0 are vulnerable to buffer overflow vulnerability in wcsxfrm/wcsxfrm_l functions resulting into denial-of-service by crashing the process or potential hijack of the process running with administrative privileges triggered by specially crafted input string.

Timeline

dates in UTC

2017-07-2122:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 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-2017-7523?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-7523?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Cygwin

Branch	Affected	Fixed in	Source
1.7	= 1.7.2	no fix published	NVD
1.7	= 1.7.3	no fix published	NVD
1.7	= 1.7.5	no fix published	NVD
1.7	= 1.7.6	no fix published	NVD
1.7	= 1.7.7	no fix published	NVD
1.7	= 1.7.8	no fix published	NVD
1.7	= 1.7.9	no fix published	NVD
1.7	= 1.7.10	no fix published	NVD
1.7	= 1.7.11	no fix published	NVD
1.7	= 1.7.12	no fix published	NVD
1.7	= 1.7.13	no fix published	NVD
1.7	= 1.7.14	no fix published	NVD

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

Fix

Advisories and patches

cygwin.comVendor Advisory

Detection

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

Sources

NVDCVSS 3.07.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
CNAweakness (CWE)CWE-787read 2026-10-23
NVDweakness (CWE)CWE-119read 2026-10-23
FIRST EPSSEPSS score2.7 %2026-10-23

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: 2017-07-21
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2017-7523?

Is CVE-2017-7523 actively exploited?

Active exploitation of CVE-2017-7523 has not been confirmed. Its EPSS score was 2.7% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-7523?

CVE-2017-7523 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.

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