HIGH
CVE-2021-35515
CWE-834Published: July 13, 2021· Updated: Jun 17, 2026
7.5
CVSS v3.1
Official Description
When reading a specially crafted 7Z archive, the construction of the list of codecs that decompress an entry can result in an infinite loop. This could be used to mount a denial of service attack against services that use Compress' sevenz package.
Technical Analysis
CVE-2021-35515 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
Apache1 product(s)
commons compress
netapp2 product(s)
active iq unified manageroncommand insight
Oracle23 product(s)
banking digital experiencebanking enterprise default managementbanking party managementbanking paymentsbanking trade financebanking treasury managementbusiness process management suitecommerce guided searchcommunications billing and revenue managementcommunications cloud native core automated test suitecommunications cloud native core service communication proxycommunications cloud native core unified data repository+11
Source: NVD CPE · 45 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (42)
→
http://www.openwall.com/lists/oss-security/2021/07/13/1Mailing List · Third Party Advisory
→
Quick Facts
CVE IDCVE-2021-35515
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-834
CISA KEVNo
Affected3 vendor(s)
PublishedJul 13, 2021
Related CVEs (CWE-834)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-35515 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.