HOMEVULNERABILITIESCVE-2020-10867
CRITICAL

CVE-2020-10867

CWE-668Published: April 1, 2020· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

An issue was discovered in Avast Antivirus before 20. The aswTask RPC endpoint for the TaskEx library in the Avast Service (AvastSvc.exe) allows attackers to bypass intended access restrictions on tasks from an untrusted process, when Self Defense is enabled.

NVD Source

Technical Analysis

CVE-2020-10867 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 complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

avast1 product(s)
antivirus
Microsoft1 product(s)
windows
Source: NVD CPE · 2 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

ADVISORYhttps://forum.avast.com/index.php?topic=232420.0
ADVISORYhttps://forum.avast.com/index.php?topic=232423.0
ADVISORYhttps://github.com/umarfarook882/Avast_Multiple_Vulnerability_Disclosure/blob/master/README.md
ADVISORYhttps://forum.avast.com/index.php?topic=232420.0
ADVISORYhttps://forum.avast.com/index.php?topic=232423.0
ADVISORYhttps://github.com/umarfarook882/Avast_Multiple_Vulnerability_Disclosure/blob/master/README.md

All References (6)

→
https://forum.avast.com/index.php?topic=232420.0Release Notes · Vendor Advisory
→
https://forum.avast.com/index.php?topic=232423.0Release Notes · Vendor Advisory
→
https://github.com/umarfarook882/Avast_Multiple_Vulnerability_Disclosure/blob/master/README.mdExploit · Third Party Advisory
→
https://forum.avast.com/index.php?topic=232420.0Release Notes · Vendor Advisory
→
https://forum.avast.com/index.php?topic=232423.0Release Notes · Vendor Advisory
→
https://github.com/umarfarook882/Avast_Multiple_Vulnerability_Disclosure/blob/master/README.mdExploit · Third Party Advisory

Quick Facts

CVE IDCVE-2020-10867
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-668
CISA KEVNo
Affected2 vendor(s)
PublishedApr 1, 2020

Related CVEs (CWE-668)

CVE-2019-8779
10.0
CVE-2012-1846
10.0
CVE-2022-1467
9.9
CVE-2019-16541
9.9
CVE-2019-10781
9.8
CVE-2008-7291
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-10867 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.
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