CVE-2020-6621
CVE-2020-6621 is a high-severity vulnerability in Nothings Stb Truetype.h 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-125.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v2: 6.8
- EPSS exploit prediction: 1% (63rd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-125
- Affected product: Nothings Stb Truetype.h
- Published:
- Last modified:
Description
stb stb_truetype.h through 1.22 has a heap-based buffer over-read in ttUSHORT.
Frequently asked questions
- What is CVE-2020-6621?
- stb stb_truetype.h through 1.22 has a heap-based buffer over-read in ttUSHORT.
- How severe is CVE-2020-6621?
- CVE-2020-6621 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-2020-6621 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-6621?
- CVE-2020-6621 affects Nothings Stb Truetype.h. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-6621?
- 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-2020-6621 published?
- CVE-2020-6621 was published on 2020-01-08 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:nothings:stb_truetype.h:*:*:*:*:*:*:*:*
More vulnerabilities in Nothings Stb Truetype.h
- CVE-2020-6623 — High (CVSS 8.8): stb stb_truetype.h through 1.22 has an assertion failure in stbtt__cff_get_index.
- CVE-2020-6622 — High (CVSS 8.8): stb stb_truetype.h through 1.22 has a heap-based buffer over-read in stbtt__buf_peek8.
- CVE-2020-6620 — High (CVSS 8.8): stb stb_truetype.h through 1.22 has a heap-based buffer over-read in stbtt__buf_get8.
- CVE-2020-6619 — High (CVSS 8.8): stb stb_truetype.h through 1.22 has an assertion failure in stbtt__buf_seek.
- CVE-2020-6618 — High (CVSS 8.8): stb stb_truetype.h through 1.22 has a heap-based buffer over-read in stbtt__find_table.
- CVE-2020-6617 — High (CVSS 8.8): stb stb_truetype.h through 1.22 has an assertion failure in stbtt__cff_int.
All CVEs affecting Nothings Stb Truetype.h →
Other CWE-125 (Out-of-bounds Read) vulnerabilities
- CVE-2026-24826 — Critical (CVSS 10.0): Out-of-bounds Write, Divide By Zero, NULL Pointer Dereference, Use of Uninitialized Resource, Out-of-bounds Read,…
- CVE-2024-22004 — Critical (CVSS 10.0): Due to length check, an attacker with privilege access on a Linux Nonsecure operating system can trigger a…
- CVE-2021-41556 — Critical (CVSS 10.0): sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that…
- CVE-2021-21777 — Critical (CVSS 10.0): An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer…
- CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
- CVE-2013-0767 — Critical (CVSS 10.0): The nsSVGPathElement::GetPathLengthScale function in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and…