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CVE-2017-9502

20
FAUCET Score

CVE-2017-9502 describes a heap-based buffer overflow vulnerability affecting libcurl versions prior to 7.54.1 on Windows and DOS. This flaw occurs when libcurl's default protocol function processes a URL without a scheme, specifically when the default protocol is set to FILE or a file: URL lacks two slashes, and the URL begins with a drive letter. The vulnerability, rated Medium (CVSS 5.3), could lead to a denial of service (A:L) due to memory corruption, but does not impact confidentiality or integrity. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 7.54.0CPE matchmatch criteria
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.29%
Probability of exploitation in next 30 days
EPSS Percentile
87.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0329 is in the 82nd percentile among its peer group of 23,690 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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

Patch Available

Vendor Patches (2)

jitsipatch availablevia llm_extracted
Fixed in: 7.54.0
View patch
sierra_wirelesspatch availablevia llm_extracted
Fixed in: 7.54.0
View patch

Vendor Advisories (3)

redhatCVE-2017-9502Moderate

curl: URL file scheme drive letter buffer overflow

Jun 14, 2017
sierra_wirelessllm-sierra_wireless-5189ff7170d43fe7HIGH

URL file scheme drive letter buffer overflow

Jun 14, 2017
jitsillm-jitsi-f34dab8609574640HIGH

URL file scheme drive letter buffer overflow

Jun 14, 2017

References

openwall.com / lists/oss-security/2017/06/14/1
Mailing ListThird Party Advisory
curl.haxx.se / docs/adv_20170614.html
Vendor Advisory
securityfocus.com / bid/99120
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038697