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Vulnerability details: VCID-wyth-7b6q-cqac
Vulnerability ID VCID-wyth-7b6q-cqac
Aliases CVE-2021-35940
Summary An out-of-bounds array read in the apr_time_exp*() functions was fixed in the Apache Portable Runtime 1.6.3 release (CVE-2017-12613). The fix for this issue was not carried forward to the APR 1.7.x branch, and hence version 1.7.0 regressed compared to 1.6.3 and is vulnerable to the same issue.
Status Published
Exploitability 0.5
Weighted Severity 6.4
Risk 3.2
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-125 Out-of-bounds Read
System Score Found at
cvssv3 7.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-35940.json
epss 0.00057 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00057 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00057 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00057 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00057 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00057 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00057 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00057 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00057 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00057 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
epss 0.00058 https://api.first.org/data/v1/epss?cve=CVE-2021-35940
cvssv3.1 7.1 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 3.6 https://nvd.nist.gov/vuln/detail/CVE-2021-35940
cvssv3.1 7.1 https://nvd.nist.gov/vuln/detail/CVE-2021-35940
archlinux Medium https://security.archlinux.org/AVG-2313
Reference id Reference type URL
http://mail-archives.apache.org/mod_mbox/www-announce/201710.mbox/%3CCACsi251B8UaLvM-rrH9fv57-zWi0zhyF3275_jPg1a9VEVVoxw%40mail.gmail.com%3E
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-35940.json
https://api.first.org/data/v1/epss?cve=CVE-2021-35940
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35940
https://dist.apache.org/repos/dist/release/apr/patches/apr-1.7.0-CVE-2021-35940.patch
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://lists.apache.org/thread.html/r1c788464a25fbc046a72aff451bc8186386315d92a2dd0349903fa4f%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r317c398ee5736e627f7887b06607e5c58b45a696d352ba8c14615f55%40%3Cdev.apr.apache.org%3E
https://lists.apache.org/thread.html/r54c755c74b9e3846cfd84039b1967d37d2870750a02d7c603983f6ed%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r72479f4dcffaa8a4732d5a0e87fecc4bace4932e28fc26f7d400e2b3%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r72a069753b9363c29732e59ad8f0d22a633fb6a699980407511ac961%40%3Cdev.apr.apache.org%3E
https://lists.apache.org/thread.html/r7bb4a6ed88fc48152174e664aae30ea9a8b058eb5b44cf08cb9beb4b%40%3Cdev.apr.apache.org%3E
https://lists.apache.org/thread.html/r7bb4a6ed88fc48152174e664aae30ea9a8b058eb5b44cf08cb9beb4b%40%3Cdev.httpd.apache.org%3E
https://lists.apache.org/thread.html/ra2868b53339a6af65577146ad87016368c138388b09bff9d2860f50e%40%3Cdev.apr.apache.org%3E
https://lists.apache.org/thread.html/ra38094406cc38a05218ebd1158187feda021b0c3a1df400bbf296af8%40%3Cdev.apr.apache.org%3E
https://lists.apache.org/thread.html/rafe54755850e93de287c36540972457b2dd86332106aa7817c7c27fb%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/rb1f3c85f50fbd924a0051675118d1609e57957a02ece7facb723155b%40%3Cannounce.apache.org%3E
http://svn.apache.org/viewvc?view=revision&revision=1891198
https://www.oracle.com/security-alerts/cpujul2022.html
http://www.openwall.com/lists/oss-security/2021/08/23/1
1980328 https://bugzilla.redhat.com/show_bug.cgi?id=1980328
992789 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=992789
AVG-2313 https://security.archlinux.org/AVG-2313
cpe:2.3:a:apache:portable_runtime:1.7.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apache:portable_runtime:1.7.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:*
CVE-2021-35940 https://nvd.nist.gov/vuln/detail/CVE-2021-35940
USN-5056-1 https://usn.ubuntu.com/5056-1/
No exploits are available.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-35940.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:L/AC:L/Au:N/C:P/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-35940
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-35940
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.17769
EPSS Score 0.00057
Published At Sept. 9, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:30:40.189092+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.14/main.json 37.0.0