CVE-2026-15718

mediumpriority · track · 10EPSS 0.005 · 41 %ileexploit · PoCDEEUNLRUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.49% (41st) EPSS

CVSS 4.3 · medium

Is it mine?

22 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-22

We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6, Firefox ESR 140.13, and Thunderbird 140.13.

cvss

Technical severity, 0–10. One row per scoring source.

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.14.3mediumAV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:Nsecondary · ENISA EU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:Nsecondaryexploitability 2.8 · impact 1.4

v3.14.1mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:Psecondary · CVSS-BT (t0sche)

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:Nsecondary · NCSC-NL NL

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-763USCWE-763USCWE-763US

exploits (1)

Public proof-of-concept and weaponised exploit code.

SneakyNachos/CVE-2026-15718-who-put-ptrs-in-my-wasmPoC exploit chain for CVE-2026-15718: SpiderMonkey wasm baseline compiler array.fill missing-sync -> invalid pointer -> addrOf/fakeobj -> arbitrary R/W -> RCEPoC · poc_in_github

affected products (22)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
IGEL OSall versionscert_bundDEcpe:/o:igel:os:-
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
RESF Rocky Linuxall versionscert_bundDEcpe:/o:resf:rocky_linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Mozilla Firefox< 153cert_bundDE
Mozilla Firefox ESR< 115.38cert_bundDE
Mozilla Firefox ESR< 140.13cert_bundDE
Mozilla Mozilla Firefox <153< 153cert_bundDE
Mozilla Mozilla Firefox ESR <115.38< 115.38cert_bundDE
Mozilla Mozilla Firefox ESR <140.13< 140.13cert_bundDE
Mozilla Mozilla Thunderbird <140.13< 140.13cert_bundDE
Mozilla Mozilla Thunderbird <153< 153cert_bundDE
Mozilla Thunderbird< 140.13cert_bundDE
Mozilla Thunderbird< 153cert_bundDE
Mozilla Corp. Firefox≤ 152.0.6fstec_bduRU
АО «ИВК» АЛЬТ СП 10all versionsfstec_bduRU

showing 20 of 22

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2026-0242Kwetsbaarheden verholpen in Mozilla FirefoxNL2026-07-16csaf · ncsc_nlNL
Mozilla heeft kwetsbaarheden verholpen in Firefox, specifiek in versie 152.0.6.
WID-SEC-W-2026-2340Mozilla Firefox: Mehrere Schwachstellen ermöglichen nicht spezifizierten AngriffDeutsch2026-07-14csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Mozilla Firefox ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.
WID-SEC-W-2026-2458Mozilla Firefox und Thunderbird: Mehrere SchwachstellenDeutsch2026-07-21csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Mozilla Firefox und Mozilla Thunderbird ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, Berechtigungen zu erweitern, Sandbox-Escapes durchzuführen, Daten zu manipulieren, einen Denial-of-Service-Zustand auszulösen oder Speicherbeschädigungen zu verursachen.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund ncsc_nl NVD CVE.org MITRE

published 2026-07-14modified 2026-07-22

references (10)

External citations — patches, advisories, analysis.

scry

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