CVE-2016-1974: n/a vulnerability

CVE-2016-1974: The nsScannerString::AppendUnicodeTo function in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38...

The nsScannerString::AppendUnicodeTo function in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7 does not verify that memory allocation succeeds, which allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read) via crafted Unicode data in an HTML, XML, or SVG document.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 5, 2024, 23:17 UTC (UTC+00:00)

Security readout for executives and security teams

This is an old Mozilla Firefox memory-handling flaw. A malicious HTML, XML, or SVG document with crafted Unicode data could crash the browser or potentially run attacker-controlled code. The main business risk is legacy browser exposure, not current mainstream Firefox installations. Exposure is most likely on unmanaged endpoints, embedded desktops, old Linux images, kiosks, or long-lived servers using Firefox ESR 38.x before 38.7 or Firefox before 45.0. Modern patched Firefox versions are not indicated as affected in the source bundle. Treat this as high severity where legacy Firefox exists, because the stated impact includes remote code execution. For normal managed fleets running current browsers, priority is verification and cleanup rather than incident response, since the provided sources do not show active exploitation. Mitigation focus: Upgrade Firefox to 45.0 or later where applicable.; Upgrade Firefox ESR to 38.7 or later where applicable.; Use vendor-supported OS browser packages from Mozilla or Linux distribution advisories..

Prepared: Jun 13, 2026, 21:06 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup

cve · low confidence lookup

CVE-2016-1974 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup

Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Mar 13, 2016, 18:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://bugzilla.mozilla.org/show_bug.cgi?id=1228103CVE reference · x_refsource_CONFIRM
GLSA-201605-06CVE reference · vendor-advisory, x_refsource_GENTOO

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.