Is CVE-2020-21596 in the CISA KEV catalog?

No. CVE-2020-21596 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-21596?

CVE-2020-21596 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2020-21596?

CVE-2020-21596 has an EPSS score of 1.39% (69th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-21596?

Upgrade libde265 on debian 11 to 1.0.11-0+deb11u1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2020-21596

MEDIUM

6.5

CVSS v3

NVD

Description

libde265 v1.0.4 contains a global buffer overflow in the decode_CABAC_bit function, which can be exploited via a crafted a file.

CWE-120Classic Buffer Overflow

How to fix

Remediation Available

libde265Debian

Fixed in:1.0.11-0+deb11u1CVE-2020-21596

Fixed in:1.0.11-1CVE-2020-21596

libde265Ubuntu

Fixed in:1.0.2-2ubuntu0.16.04.1~esm1USN-6617-1

Fixed in:1.0.2-2ubuntu0.18.04.1~esm1USN-6617-1

Fixed in:1.0.4-1ubuntu0.1USN-6617-1

libde265-0Ubuntu

Fixed in:1.0.2-2ubuntu0.16.04.1~esm1USN-6617-1

Fixed in:1.0.2-2ubuntu0.18.04.1~esm1USN-6617-1

Fixed in:1.0.4-1ubuntu0.1USN-6617-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

1.39%probability of exploitation in 30 days

69thpercentile

Moderate risk: more likely to be exploited than 69% of all known CVEs.

References

Exploit1

github.com

Third-Party Advisory2

Related Vulnerabilities

Other CWE-120 (Classic Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0195	Medium	6.8	100%	-	Fix
CVE-2017-7269	Critical	9.8	100%	KEV	-
CVE-2019-11043	High	8.7	99%	KEV + Ransom	Fix
CVE-2011-4862	High	10.0	95%	-	Fix
CVE-2007-5659	High	7.8	94%	KEV	Fix
CVE-2022-3786	High	7.5	91%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.