What’s Vulnerable › Vulnerabilities

CVE-2021-34121

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-07-18 · updated 2026-06-17
• Weakness: CWE-125

Description

An Out of Bounds flaw was discovered in htmodoc 1.9.12 in function parse_tree() in toc.cxx, this possibly leads to memory layout information leaking in the data. This might be used in a chain of vulnerability in order to reach code execution.

Affected products

• htmldoc: 1.9.12

References

• https://github.com/michaelrsweet/htmldoc/commit/c67bbd8756f015e33e4ba639a40c7f9d8bd9e8ab
• https://github.com/michaelrsweet/htmldoc/issues/433
• https://github.com/michaelrsweet/htmldoc/commit/c67bbd8756f015e33e4ba639a40c7f9d8bd9e8ab
• https://github.com/michaelrsweet/htmldoc/issues/433

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