8.6

CVE-2020-37167: clamav clambc

CVSS: 8.6v4.0HighDeferred
AliasesUBUNTU-CVE-2020-37167DEBIAN-CVE-2020-37167
Published 12-02-2026Last modified 30-09-2026
Open JSON

Vulnerability summary

CVE-2020-37167 is a high (CVSS 8.6) vulnerability in clamav clambc. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.5% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
44/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.6/10
010
High · v4.0 (CVE.org)
EPSS score
0.19%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1exploit-database

Timeline

  1. 12-02-2026
    PublishedVulnerability first disclosed.
  2. 30-09-2026
    Last modifiedVulnerability information updated.

Description

ClamAV versions prior to 0.103.0-rc contain a vulnerability in function name processing through the ClamBC bytecode interpreter that allows attackers to manipulate bytecode function names. Attackers can exploit the weak input validation in function name encoding to potentially execute malicious bytecode or cause unexpected behavior in the ClamAV engine.

CVSS metrics

7 scores · 4 sources · 2 versions

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

+0.02 pp

From 0.18% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.19%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • exploit-databaselocallinuxUnverified

    ClamAV < 0.102.0 - 'bytecode_vm' Code Execution

    Maturity: poc

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu2 products
  • clamavAll versions (No fix recorded)
  • libclamunrarAll versions (No fix recorded)
Clamav1 product
Debian1 product
  • clamav< 0.103.0+dfsg-1

3 vendors · 4 products

References

8 links