CVE-2021-36740

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

1.59% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 75.2% of scored records. A rank, not a probability.

NVD base score

6.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-07-14 16:07Z5 YR AGO

Last updated

2024-08-04 01:01Z2 YR AGO

Reserved

2021-07-14

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')Base

Data version

5.1

Document digest

8934659738b7881b236e1eacf5716a39da7c57ec7fe85eb9440d204a4b9c0383

• varnish-cache.orghttps://varnish-cache.org/security/VSV00007.htmlx_refsource_MISC
• docs.varnish-software.comhttps://docs.varnish-software.com/security/VSV00007/x_refsource_MISC
• github.comhttps://github.com/varnishcache/varnish-cache/commit/9be22198e258d0e7a5c41f4291792214a29405cfx_refsource_MISC
• github.comhttps://github.com/varnishcache/varnish-cache/commit/82b0a629f60136e76112c6f2c6372cce77b683bex_refsource_MISC
• lists.fedoraproject.orgFEDORA-2021-36e10d3f9fhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZHBNLDEOTGYRIEQZBWV7F6VPYS4O2AAK/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-cf7585f0cahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THV2DQA2GS65HUCKK4KSD2XLN3AAQ2V5/vendor-advisoryx_refsource_FEDORA
• www.debian.orgDSA-5088https://www.debian.org/security/2022/dsa-5088vendor-advisoryx_refsource_DEBIAN