CVE-2021-26690

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

65.30% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 99.1% of scored records. A rank, not a probability.

NVD base score

7.5 (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:N/I:N/A:H

NVD analysis status

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

Red Hat severity

Moderate. 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

2021-06-10 07:10Z5 YR AGO

Last updated

2024-08-03 20:33Z2 YR AGO

Reserved

2021-02-04

Assigning CNA

apache

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-476NULL Pointer DereferenceBase

Data version

5.1

Document digest

7ac26e5d6a6b55f14403f9bd7248477371354f2f6245da42f84fe10bacca2ef4

• httpd.apache.orghttp://httpd.apache.org/security/vulnerabilities_24.htmlx_refsource_MISC
• lists.apache.orghttps://lists.apache.org/thread.html/re026d3da9d7824bd93b9f871c0fdda978d960c7e62d8c43cba8d0bf3%40%3Ccvs.httpd.apache.org%3Ex_refsource_MISC
• lists.apache.org[httpd-announce] 20210609 CVE-2021-26690: mod_session NULL pointer dereferencehttps://lists.apache.org/thread.html/rae406c1d19c0dfd3103c96923dadac2af1cd0bad6905ab1ede153865%40%3Cannounce.httpd.apache.org%3Emailing-listx_refsource_MLIST
• lists.apache.org[httpd-dev] 20210610 Re: svn commit: r1890598 - in /httpd/site/trunk/content/security/json: CVE-2019-17567.json CVE-2020-13938.json CVE-2020-13950.json CVE-2020-35452.json CVE-2021-26690.json CVE-2021-26691.json CVE-2021-30641.json CVE-2021-31618.jsonhttps://lists.apache.org/thread.html/r7f2b70b621651548f4b6f027552f1dd91705d7111bb5d15cda0a68dd%40%3Cdev.httpd.apache.org%3Emailing-listx_refsource_MLIST
• www.openwall.com[oss-security] 20210609 CVE-2021-26690: Apache httpd: mod_session NULL pointer dereferencehttp://www.openwall.com/lists/oss-security/2021/06/10/6mailing-listx_refsource_MLIST
• lists.debian.org[debian-lts-announce] 20210709 [SECURITY] [DLA 2706-1] apache2 security updatehttps://lists.debian.org/debian-lts-announce/2021/07/msg00006.htmlmailing-listx_refsource_MLIST
• www.debian.orgDSA-4937https://www.debian.org/security/2021/dsa-4937vendor-advisoryx_refsource_DEBIAN
• security.gentoo.orgGLSA-202107-38https://security.gentoo.org/glsa/202107-38vendor-advisoryx_refsource_GENTOO
• lists.fedoraproject.orgFEDORA-2021-dce7e7738ehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-e3f6dd670dhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/vendor-advisoryx_refsource_FEDORA
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuoct2021.htmlx_refsource_MISC
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20210702-0001/x_refsource_CONFIRM