CVE-2020-1914

Q: How do I fix CVE-2020-1914?

Upgrade hermes to 2020-10-01 or later.

Q: Is CVE-2020-1914 being actively exploited?

Not that we know of. CVE-2020-1914 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.5% is the estimated probability that it will be exploited in the next 30 days. That is higher than 83% of all scored CVEs.

Q: How severe is CVE-2020-1914?

CVE-2020-1914 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2020-1914 affect?

Published advisories record a fix for hermes (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

CRITICALEPSS 83th pctl

9.8

CVSS v3

NVD

Description

A logic vulnerability when handling the SaveGeneratorLong instruction in Facebook Hermes prior to commit b2021df620824627f5a8c96615edbd1eb7fdddfc allows attackers to potentially read out of bounds or theoretically execute arbitrary code via crafted JavaScript. Note that this is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. Hence, most React Native applications are not affected.

CWE-670

How to fix

Remediation Available

hermesNVD

Affected:< 2020-10-01Fixed in:2020-10-01CVE-2020-1914derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

2.51%probability of exploitation in 30 days

83rdpercentile

Elevated risk: more likely to be exploited than 83% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

facebook.com

Related Vulnerabilities

Other CWE-670 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-9425	High	7.5	17%	-	Fix
CVE-2019-9946	High	7.5	3.1%	-	Fix
CVE-2024-32896	High	7.8	3.0%	KEV	-
CVE-2019-17192	Critical	9.8	2.7%	-	-
CVE-2026-38361	High	7.5	2.6%	-	-
CVE-2020-36277	High	7.5	2.4%	-	Fix

Common questions

How do I fix CVE-2020-1914?

Upgrade hermes to 2020-10-01 or later.

Is CVE-2020-1914 being actively exploited?

Not that we know of. CVE-2020-1914 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.5% is the estimated probability that it will be exploited in the next 30 days. That is higher than 83% of all scored CVEs.

How severe is CVE-2020-1914?

CVE-2020-1914 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2020-1914 affect?

Published advisories record a fix for hermes (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.