Security readout for executives and security teams
Apache Commons Compress versions 1.6 through 1.20 can hang when processing a maliciously crafted 7Z archive. A service that accepts or analyzes untrusted archives could become unavailable. The sources describe denial of service only, not data theft or code execution. Most relevant to Java services, pipelines, and products that parse, upload, inspect, or transform 7Z archives using Apache Commons Compress 1.6 through 1.20. Systems that include the library but never process untrusted 7Z content have lower practical exposure. Treat this as a targeted availability risk. Prioritize internet-facing or customer-facing archive processing first, then internal batch systems where outages would disrupt operations. It is less urgent than remote code execution, but exposed services should not wait for routine maintenance. Mitigation focus: Inventory direct and transitive Apache Commons Compress versions.; Upgrade affected Commons Compress deployments beyond 1.20 according to Apache or vendor guidance.; Restrict untrusted 7Z uploads where business workflows allow it..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-834: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-35515 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://commons.apache.org/proper/commons-compress/security-reports.htmlCVE reference · x_refsource_MISC
- https://lists.apache.org/thread.html/r19ebfd71770ec0617a9ea180e321ef927b3fefb4c81ec5d1902d20ab%40%3Cuser.commons.apache.org%3ECVE reference · x_refsource_MISC
- [announce] 20210713 CVE-2021-35515: Apache Commons Compress 1.6 to 1.20 denial of service vulnerabilityCVE reference · mailing-list, x_refsource_MLIST
- [pulsar-commits] 20210716 [GitHub] [pulsar] lhotari opened a new pull request #11345: [Security] Upgrade commons-compress to 1.21CVE reference · mailing-list, x_refsource_MLIST
- [druid-commits] 20210726 [GitHub] [druid] suneet-s opened a new pull request #11496: Address CVE-2021-35515 CVE-2021-36090CVE reference · mailing-list, x_refsource_MLIST
- [druid-commits] 20210726 [GitHub] [druid] suneet-s merged pull request #11496: Address CVE-2021-35515 CVE-2021-36090CVE reference · mailing-list, x_refsource_MLIST
- [druid-commits] 20210726 [druid] branch master updated: Address CVE-2021-35515 CVE-2021-36090 (#11496)CVE reference · mailing-list, x_refsource_MLIST
- [skywalking-notifications] 20210802 [GitHub] [skywalking] wu-sheng opened a new pull request #7400: Fix CVE-2021-35515, CVE-2021-35516, CVE-2021-35517, CVE-2021-36090CVE reference · mailing-list, x_refsource_MLIST
- [skywalking-notifications] 20210802 [skywalking] 01/01: Fix CVE-2021-35515, CVE-2021-35516, CVE-2021-35517, CVE-2021-36090CVE reference · mailing-list, x_refsource_MLIST
- [skywalking-notifications] 20210803 [skywalking] branch master updated: Fix CVE-2021-35515, CVE-2021-35516, CVE-2021-35517, CVE-2021-36090 (#7400)CVE reference · mailing-list, x_refsource_MLIST
- [skywalking-notifications] 20210803 [GitHub] [skywalking] hanahmily merged pull request #7400: Fix CVE-2021-35515, CVE-2021-35516, CVE-2021-35517, CVE-2021-36090CVE reference · mailing-list, x_refsource_MLIST
- [skywalking-notifications] 20210803 [GitHub] [skywalking] codecov[bot] edited a comment on pull request #7400: Fix CVE-2021-35515, CVE-2021-35516, CVE-2021-35517, CVE-2021-36090CVE reference · mailing-list, x_refsource_MLIST
- [skywalking-notifications] 20210802 [GitHub] [skywalking] codecov[bot] commented on pull request #7400: Fix CVE-2021-35515, CVE-2021-35516, CVE-2021-35517, CVE-2021-36090CVE reference · mailing-list, x_refsource_MLIST
- [skywalking-notifications] 20210802 [GitHub] [skywalking] codecov[bot] edited a comment on pull request #7400: Fix CVE-2021-35515, CVE-2021-35516, CVE-2021-35517, CVE-2021-36090CVE reference · mailing-list, x_refsource_MLIST
- [poi-dev] 20210923 Re: [VOTE] Apache POI 5.1.0 release (RC1)CVE reference · mailing-list, x_refsource_MLIST
- https://www.oracle.com/security-alerts/cpuoct2021.htmlCVE reference · x_refsource_MISC
- https://www.oracle.com/security-alerts/cpujan2022.htmlCVE reference · x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20211022-0001/CVE reference · x_refsource_CONFIRM
- https://www.oracle.com/security-alerts/cpuapr2022.htmlCVE reference · x_refsource_MISC
- https://www.oracle.com/security-alerts/cpujul2022.htmlCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Excessive Iteration
Excessive Iteration represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.