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CVE-2021-35516

30
FAUCET Score

CVE-2021-35516 is a Denial of Service vulnerability affecting Apache, NetApp, and Oracle products that utilize the Compress sevenz package. An attacker can craft a malicious 7Z archive to trigger excessive memory allocation, leading to an out-of-memory error and service disruption. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low attack complexity and no user interaction required, resulting in high availability impact. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.6, <= 1.20CPE matchmatch criteria
cpe:2.3:a:apache:commons_compress:*:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:linux:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
12.37%
Probability of exploitation in next 30 days
EPSS Percentile
95.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.1236 is in the 94th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

mavenpatch availablevia ghsa
Product: org.apache.commons:commons-compressFixed in: 1.21
oraclepatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Fuse 7.11Fixed in: apache-commons-compress
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization Engine 4.4Fixed in: apache-commons-compress-0:1.21-1.2.el8ev
View patch
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-maven36-apache-commons-compress
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: apache-commons-compress
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: eclipse:rhel8/apache-commons-compress
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: javapackages-tools:201801/apache-commons-compress

Vendor Advisories (2)

mavenGHSA-crv7-7245-f45fhigh

Improper Handling of Length Parameter Inconsistency in Compress

Aug 2, 2021
redhatCVE-2021-35516Moderate

apache-commons-compress: excessive memory allocation when reading a specially crafted 7Z archive

Jul 13, 2021

References

commons.apache.org / proper/commons-compress/security-reports.html
Vendor Advisory
lists.apache.org / thread.html/r67ef3c07fe3b8c1b02d48012149d280ad6da8e4cec253b527520fb2b%40%3Cdev.poi.apache.org%3E
lists.apache.org / thread.html/r9f54c0caa462267e0cc68b49f141e91432b36b23348d18c65bd0d040%40%3Cnotifications.skywalking.apache.org%3E
lists.apache.org / thread.html/racd0c0381c8404f298b226cd9db2eaae965b14c9c568224aa3f437ae%40%3Cnotifications.skywalking.apache.org%3E
lists.apache.org / thread.html/rb064d705fdfa44b5dae4c366b369ef6597951083196321773b983e71%40%3Ccommits.pulsar.apache.org%3E
lists.apache.org / thread.html/rb6e1fa80d34e5ada45f72655d84bfd90db0ca44ef19236a49198c88c%40%3Cnotifications.skywalking.apache.org%3E
lists.apache.org / thread.html/rb7adf3e55359819e77230b4586521e5c6874ce5ed93384bdc14d6aee%40%3Cnotifications.skywalking.apache.org%3E
lists.apache.org / thread.html/rba65ed5ddb0586f5b12598f55ec7db3633e7b7fede60466367fbf86a%40%3Cnotifications.skywalking.apache.org%3E
lists.apache.org / thread.html/rd4332baaf6debd03d60deb7ec93bee49e5fdbe958cb6800dff7fb00e%40%3Cnotifications.skywalking.apache.org%3E
lists.apache.org / thread.html/rf5b1016fb15b7118b9a5e16bb0b78cb4f1dfcf7821eb137ab5757c91%40%3Cannounce.apache.org%3E
lists.apache.org / thread.html/rf68442d67eb166f4b6cf0bbbe6c7f99098c12954f37332073c9822ca%40%3Cuser.commons.apache.org%3E
Mailing ListVendor Advisory
lists.apache.org / thread.html/rfba19167efc785ad3561e7ef29f340d65ac8f0d897aed00e0731e742%40%3Cnotifications.skywalking.apache.org%3E
security.netapp.com / advisory/ntap-20211022-0001
Third Party Advisory
oracle.com / security-alerts/cpuapr2022.html
PatchThird Party Advisory
oracle.com / security-alerts/cpujan2022.html
PatchThird Party Advisory
oracle.com / security-alerts/cpujul2022.html
PatchThird Party Advisory
oracle.com / security-alerts/cpuoct2021.html
PatchThird Party Advisory
openwall.com / lists/oss-security/2021/07/13/2
Mailing ListThird Party Advisory