Is CVE-2019-3822 being actively exploited?

CVE-2019-3822 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2019-3822?

CVE-2019-3822 has a CVSS 3.1 base score of 9.8 (CRITICAL).

CVE-2019-3822

CRITICAL · CVSS 9.8EPSS 12.9%EU EUVD

libcurl versions from 7.36.0 to before 7.64.0 are vulnerable to a stack-based buffer overflow. The function creating an outgoing NTLM type-3 header (`lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message()`), generates the request HTTP header contents based on previously received data. The check that exists to prevent the local buffer from getting overflowed is implemented wrongly (using unsigned math) and as such it does not prevent the overflow from happening. This output data can grow larger than the local buffer if very large 'nt response' data is extracted from a previous NTLMv2 header provided by the malicious or broken HTTP server. Such a 'large value' needs to be around 1000 bytes or more. The actual payload data copied to the target buffer comes from the NTLMv2 type-2 response header.

Key facts

CVSS score: 9.8 (v3.1)
Severity: CRITICAL
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-121
EPSS score: 12.9% (96th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2019-13445)
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-2019-13445 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
netapp / active iq unified manager
netapp / active iq unified manager
netapp / clustered data ontap
netapp / oncommand insight
netapp / oncommand workflow automation
netapp / snapcenter
oracle / communications operations monitor
oracle / communications operations monitor
oracle / enterprise manager ops center
oracle / enterprise manager ops center
oracle / http server
oracle / mysql server
oracle / secure global desktop
oracle / services tools bundle
redhat / enterprise linux
siemens / sinema remote connect client

Certified products that may be affected

27 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 27 in the Security Certifications Explorer.

References

http://www.securityfocus.com/bid/106950(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-2019-3822(Exploit, Issue Tracking, Patch, Third Party Advisory)
https://cert-portal.siemens.com/productcert/pdf/ssa-436177.pdf(Third Party Advisory)
https://curl.haxx.se/docs/CVE-2019-3822.html(Patch, Vendor Advisory)
https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E
https://security.gentoo.org/glsa/201903-03(Third Party Advisory)
https://security.netapp.com/advisory/ntap-20190315-0001/(Patch, Third Party Advisory)
https://security.netapp.com/advisory/ntap-20190719-0004/(Third Party Advisory)
https://support.f5.com/csp/article/K84141449(Third Party Advisory)
https://support.f5.com/csp/article/K84141449?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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