CVE-2021-26948: htmldoc_project htmldoc
CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2021-26948DEBIAN-CVE-2021-26948
Published 03-03-2022Last modified 03-08-2024
Vulnerability summary
CVE-2021-26948 is a high (CVSS 7.8) vulnerability in htmldoc_project htmldoc. EPSS estimates a 0.84% chance of exploitation in the next 30 days, higher than 57.3% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.8/10
010
High · v3.1 (NVD)EPSS score
0.84%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Advisory lineage
Upstream 0 · Downstream 4 · Related 1Timeline
- 03-03-2022PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
Null pointer dereference in the htmldoc v1.9.11 and before may allow attackers to execute arbitrary code and cause a denial of service via a crafted html file.
CVSS metrics
4 scores · 3 sources · 2 versionsHigh 7.8Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Medium 6.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
0.84%
Chance of exploitation in the next 30 days
Percentile
57%
Versus all other CVEs
30-day change
0.00 pp
From 0.84% on 21-09-2026
21-09-202621-10-2026
EPSS score0.84%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundHtmldoc
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Debian1 product
- htmldoc< 1.9.11-4
Htmldoc_project1 product
- htmldoc1.9.11
Ubuntu1 product
- htmldoc< 1.8.27-8ubuntu1+esm3 | < 1.8.27-8ubuntu1.1+esm2 | < 1.9.2-1ubuntu0.2+esm1 | < 1.9.7-1ubuntu0.3+esm1
3 vendors · 3 products
