CVE-2020-12647

CVE-2020-12647 is a high-severity vulnerability in Unisys Algol Compiler 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.

Key facts

Description

Unisys ALGOL Compiler 58.1 before 58.1a.15, 59.1 before 59.1a.9, and 60.0 before 60.0a.5 can emit invalid code sequences under rare circumstances related to syntax. The resulting code could, for example, trigger a system fault or adversely affect confidentiality, integrity, and availability.

Frequently asked questions

What is CVE-2020-12647?
Unisys ALGOL Compiler 58.1 before 58.1a.15, 59.1 before 59.1a.9, and 60.0 before 60.0a.5 can emit invalid code sequences under rare circumstances related to syntax. The resulting code could, for example, trigger a system fault or adversely affect confidentiality, integrity, and availability.
How severe is CVE-2020-12647?
CVE-2020-12647 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-12647 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12647?
CVE-2020-12647 affects Unisys Algol Compiler. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-12647?
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-2020-12647 published?
CVE-2020-12647 was published on 2020-05-21 and last updated on 2026-06-17.

References

Affected products (1)