CVE-2020-21836
CVE-2020-21836 is a high-severity vulnerability in Gnu Libredwg with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v2: 6.8
- EPSS exploit prediction: 1% (64th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Gnu Libredwg
- Published:
- Last modified:
Description
A heap based buffer overflow vulnerability exists in GNU LibreDWG 0.10 via read_2004_section_preview ../../src/decode.c:3175.
Frequently asked questions
- What is CVE-2020-21836?
- A heap based buffer overflow vulnerability exists in GNU LibreDWG 0.10 via read_2004_section_preview ../../src/decode.c:3175.
- How severe is CVE-2020-21836?
- CVE-2020-21836 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2020-21836 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-21836?
- CVE-2020-21836 affects Gnu Libredwg. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-21836?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2020-21836 published?
- CVE-2020-21836 was published on 2021-05-17 and last updated on 2026-07-05.
References
Affected products (1)
- cpe:2.3:a:gnu:libredwg:0.10:*:*:*:*:*:*:*
More vulnerabilities in Gnu Libredwg
- CVE-2022-35164 — Critical (CVSS 9.8): LibreDWG v0.12.4.4608 & commit f2dea29 was discovered to contain a heap use-after-free via bit_copy_chain.
- CVE-2021-28237 — Critical (CVSS 9.8): LibreDWG v0.12.3 was discovered to contain a heap-buffer overflow via decode_preR13.
- CVE-2019-20914 — Critical (CVSS 9.8): An issue was discovered in GNU LibreDWG through 0.9.3. There is a NULL pointer dereference in the function…
- CVE-2019-9775 — Critical (CVSS 9.1): An issue was discovered in GNU LibreDWG 0.7 and 0.7.1645. There is an out-of-bounds read in the function…
- CVE-2019-9774 — Critical (CVSS 9.1): An issue was discovered in GNU LibreDWG 0.7 and 0.7.1645. There is an out-of-bounds read in the function bit_read_B at…
- CVE-2023-36274 — High (CVSS 8.8): LibreDWG v0.11 to v0.12.5 was discovered to contain a heap buffer overflow via the function bit_write_TF at bits.c.
All CVEs affecting Gnu Libredwg →
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