Is CVE-2018-14618 being actively exploited?

CVE-2018-14618 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2018-14618?

CVE-2018-14618 has a CVSS 3.0 base score of 7.5 (HIGH).

CVE-2018-14618

HIGH · CVSS 7.5EPSS 11.1%EU EUVD

curl before version 7.61.1 is vulnerable to a buffer overrun in the NTLM authentication code. The internal function Curl_ntlm_core_mk_nt_hash multiplies the length of the password by two (SUM) to figure out how large temporary storage area to allocate from the heap. The length value is then subsequently used to iterate over the password and generate output into the allocated storage buffer. On systems with a 32 bit size_t, the math to calculate SUM triggers an integer overflow when the password length exceeds 2GB (2^31 bytes). This integer overflow usually causes a very small buffer to actually get allocated instead of the intended very huge one, making the use of that buffer end up in a heap buffer overflow. (This bug is almost identical to CVE-2017-8816.)

Key facts

CVSS score: 7.5 (v3.0)
Severity: HIGH
CVSS vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-122
EPSS score: 11.1% (96th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2018-6525)
Published: September 5, 2018
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2018-6525 in the EU Vulnerability Database. Last updated in EUVD on April 15, 2026.

View on the EU Vulnerability Database

Affected products

canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
debian / debian linux
haxx / libcurl
redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux

Certified products that may be affected

8 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Red Hat Enterprise Linux 7 NSS Cryptographic Module - Red Hat®, Inc. - FIPS 140 4498 - historical
Red Hat Enterprise Linux 7 Kernel Crypto API Cryptographic Module - Red Hat®, Inc. - FIPS 140 3939 - historical
Red Hat Enterprise Linux 7 OpenSSH Server Cryptographic Module - Red Hat®, Inc. - FIPS 140 3891 - historical
Red Hat Enterprise Linux 7 OpenSSH Client Cryptographic Module - Red Hat®, Inc. - FIPS 140 3892 - historical
Red Hat Enterprise Linux 7 OpenSSL Cryptographic Module - Red Hat®, Inc. - FIPS 140 3867 - historical

See all 8 in the Security Certifications Explorer.

References

http://www.securitytracker.com/id/1041605(Third Party Advisory, VDB Entry)
https://access.redhat.com/errata/RHSA-2018:3558(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:1880
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14618(Issue Tracking)
https://cert-portal.siemens.com/productcert/pdf/ssa-436177.pdf
https://curl.haxx.se/docs/CVE-2018-14618.html(Vendor Advisory)
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0014(Third Party Advisory)
https://security.gentoo.org/glsa/201903-03(Third Party Advisory)
https://usn.ubuntu.com/3765-1/(Third Party Advisory)
https://usn.ubuntu.com/3765-2/(Third Party Advisory)
https://www.debian.org/security/2018/dsa-4286(Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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