[NEW] [medium] Mozilla Firefox: Multiple vulnerabilities allow unspecified attack
An attacker can exploit multiple vulnerabilities in Mozilla Firefox to conduct an unspecified attack.
CSIRTS triage
- What
- Multiple vulnerabilities allow an attacker to conduct an unspecified attack.
- Who is affected
- Users of Mozilla Firefox are affected.
- Urgency
- Remediation is medium urgency as exploitation is possible but not currently observed.
- Action
- Update to the latest version of Mozilla Firefox.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2340
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-157180.49% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-157190.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-15718 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-15719 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- high[UPDATE] [hoch] Mozilla Firefox und Thunderbird: Mehrere Schwachstellencert-bund
- unknownDSA-6418-1 thunderbird - security updatedebian
- unknownMultiple vulnerabilities in Mozilla Thunderbird (July 23, 2026)cert-fr-avis
- unknownMozilla Products Multiple Vulnerabilitieshkcert
- unknownMultiple vulnerabilities in Mozilla products (July 22, 2026)cert-fr-avis
- unknownDSA-6394-1 firefox-esr - security updatedebian
- unknownNCSC-2026-0242 [1.00] [M/H] Vulnerabilities fixed in Mozilla Firefoxncsc-nl
- unknownMozilla Products Multiple Vulnerabilitieshkcert
- unknownMultiple Vulnerabilities in Mozilla Firefox (July 15, 2026)cert-fr-avis
- mediumCVE-2026-15719: We are aware that exploit code for this is public however we are not aware of any attacks in t…nvd
- mediumCVE-2026-15718: We are aware that exploit code for this is public however we are not aware of any attacks in t…nvd
Recent advisories for Mozilla Firefox
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- high[UPDATE] [hoch] Mozilla Firefox und Thunderbird: Mehrere Schwachstellencert-bund · 2026-09-10
- high[UPDATE] [hoch] Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere Schwachstellencert-bund · 2026-09-10
- low[NEU] [niedrig] Mozilla Firefox für iOS: Schwachstelle ermöglicht Denial of Servicecert-bund · 2026-09-09
- unknownMozilla Firefox Denial of Service Vulnerabilityhkcert · 2026-09-09
- unknownVulnérabilité dans Mozilla Firefox (09 septembre 2026)cert-fr-avis · 2026-09-09
- high[UPDATE] [hoch] Mozilla Firefox und Thunderbird: Mehrere Schwachstellencert-bund · 2026-09-07
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