SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2021-35515

This could be used to mount a denial of service attack against services that use Compress' sevenz package.

HIGH 7.5EPSS 11.6%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 11.6%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.

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.

CVSS 3.1
7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
11.57% probability · 96th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-834, CWE-835
Affected
apache/commons compress · netapp/active iq unified manager · netapp/oncommand insight · oracle/banking digital experience · oracle/banking enterprise default management · oracle/banking party management · oracle/banking payments · oracle/banking trade finance · oracle/banking treasury management · oracle/business process management suite · oracle/commerce guided search · oracle/communications billing and revenue management · oracle/communications cloud native core automated test suite · oracle/communications cloud native core service communication proxy · oracle/communications cloud native core unified data repository · oracle/communications diameter intelligence hub · oracle/communications session route manager · oracle/financial services crime and compliance management studio · oracle/financial services enterprise case management · oracle/flexcube universal banking · +6 more
Source
security@apache.org
EPSS trend
0%8%15%3 November 2026: 11.57%3 November 20263 November 2026

EPSS 11.6% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.