Is CVE-2018-16890 being actively exploited?

CVE-2018-16890 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2018-16890?

CVE-2018-16890 has a CVSS 3.1 base score of 7.5 (HIGH).

CVE-2018-16890

HIGH · CVSS 7.5EPSS 5.4%EU EUVD

libcurl versions from 7.36.0 to before 7.64.0 is vulnerable to a heap buffer out-of-bounds read. The function handling incoming NTLM type-2 messages (`lib/vauth/ntlm.c:ntlm_decode_type2_target`) does not validate incoming data correctly and is subject to an integer overflow vulnerability. Using that overflow, a malicious or broken NTLM server could trick libcurl to accept a bad length + offset combination that would lead to a buffer read out-of-bounds.

Key facts

CVSS score: 7.5 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-125
EPSS score: 5.4% (93th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2018-8678)
Published: February 6, 2019
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2018-8678 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
f5 / big-ip access policy manager
haxx / libcurl
netapp / clustered data ontap
oracle / communications operations monitor
oracle / communications operations monitor
oracle / http server
oracle / secure global desktop
redhat / enterprise linux
siemens / sinema remote connect client

Certified products that may be affected

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

Red Hat Enterprise Linux 8 NSS Cryptographic Module - Red Hat, Inc. - FIPS 140 5513 - active
Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, LLC - FIPS 140 5461 - active
Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5089 - active
Red Hat Enterprise Linux 8 OpenSSL Cryptographic Module - Red Hat®, Inc. - FIPS 140 4642 - historical
Red Hat Enterprise Linux 8 NSS Cryptographic Module - Red Hat®, Inc. - FIPS 140 4458 - historical

See all 24 in the Security Certifications Explorer.

References

http://www.securityfocus.com/bid/106947(Third Party Advisory, VDB Entry)
https://access.redhat.com/errata/RHSA-2019:3701(Third Party Advisory)
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16890(Issue Tracking, Mitigation, Patch, Third Party Advisory)
https://cert-portal.siemens.com/productcert/pdf/ssa-436177.pdf(Third Party Advisory)
https://curl.haxx.se/docs/CVE-2018-16890.html(Patch, Vendor Advisory)
https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E
https://security.netapp.com/advisory/ntap-20190315-0001/(Patch, Third Party Advisory)
https://support.f5.com/csp/article/K03314397?utm_source=f5support&amp%3Butm_medium=RSS
https://usn.ubuntu.com/3882-1/(Third Party Advisory)
https://www.debian.org/security/2019/dsa-4386(Third Party Advisory)
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html(Patch, Third Party Advisory)
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html(Patch, Third Party Advisory)

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

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