Avast vulnerabilitiesNone on the known-exploited list.

Vendor
The short answer

Avast has 73 published vulnerabilities across 34 products in our catalogue. None of them is on the list of flaws known to be exploited today. The most affected product is Antivirus, with 30. If you run Avast software, patch the exploited flaws first.

See the exploited flaws

We keep watching the known-exploited list.

Products

Which Avast products have the most vulnerabilities?

Antivirus leads with 30 published vulnerabilities. Open a product to see its versions and which of its flaws criminals are already using.

Known exploited

Which Avast vulnerabilities are being exploited?

This is the list that matters most: flaws criminals are using now.

None of Avast's published vulnerabilities is on the list of flaws known to be exploited today. We keep watching that list.

Exploit likelihood

Which Avast flaws are most likely to be used?

Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.

50% or more10% to 49%Under 10%
  1. 7.9%

    Avast allows remote attackers to cause a denial of service (memory corruption) and possibly execute arbitrary code via a crafted PE file, related to authenticode parsing.

    CVSS7.8Published12 Apr 2016
  2. 7.8%

    Untrusted search path vulnerability in avast!

    CVSS9.3Published26 Aug 2010
  3. 6.3%

    Heap-based buffer overflow in the CAB unpacker in avast!

    CVSS9.3Published24 May 2007
  4. 3.7%

    Multiple stack-based buffer overflows in avast!

    CVSS6.8Published2 Jul 2009
  5. 3.2%

    avast! antivirus before 4.7.981 allows remote attackers to cause a denial of service (infinite loop) via a ZOO archive with a direntry structure that points to a previous file.

    CVSS7.8Published9 May 2007
  6. 3.2%

    unzoo.c, as used in multiple products including AMaViS 2.4.1 and earlier, allows remote attackers to cause a denial of service (infinite loop) via a ZOO archive with a direntry structure that points to a previous file.

    CVSS7.8Published9 May 2007
  7. 3.0%

    Directory traversal vulnerability in Avast before 150918-0 allows remote attackers to delete or write to arbitrary files via a crafted entry in a ZIP archive.

    CVSS6.4Published18 Oct 2015
  8. 2.9%

    avast! antivirus 4.8.1281.0, when Internet Explorer 6 or 7 is used, allows remote attackers to bypass detection of malware in an HTML document by placing an MZ header (aka "EXE info") at the beginning, and modifying...

    CVSS9.3Published12 Dec 2008
  9. 2.6%

    An issue was discovered in retdec v3.3. In function canSplitFunctionOn() of ir_modifications.cpp, there is a possible out of bounds read due to a heap buffer overflow.

    CVSS9.8Published21 Apr 2021
  10. 2.2%

    An issue was discovered in Avast Antivirus before 20.

    CVSS9.8Published1 Apr 2020
Every product

All Avast products we track.

32 products, most vulnerabilities first. Find the ones you run, then open a product to see its versions and exploited flaws.

This directory lists the 32 Avast products with at least one tracked version, of 34 in our catalogue.

Precursor Intelligence

Running Avast? We'll keep checking.

Looking flaws up one at a time doesn't scale. Tell us what you run once, and we tell you which flaws matter to you, in what order, and keep watching for new ones.

  1. Tell us what you runPick your software from a list, or let us work it out from your website.
  2. We match it to every flawOver 400,000 published flaws, checked against your list.
  3. Ranked by real-world riskA 0 to 100 score, led by evidence criminals are using it.
  4. Told as soon as we knowAn alert by email, in the app or by webhook to your own tools.

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FAQ

Common questions, answered plainly.

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Our catalogue lists 73 published vulnerabilities across 34 products and 282 versions from Avast.

None of Avast's vulnerabilities is on the list of flaws known to be exploited today.

Antivirus, with 30 published vulnerabilities. Its own page lists the ones known to be exploited.

Create a Precursor Intelligence account and track the Avast products you run. We match them against every published flaw, give each one a risk score from 0 to 100 and tell you as soon as we spot one that affects you, by email, in the app or by webhook.