Zen is a firefox-based browser. Prior to 1.21.5b, Zen's glance and split-view context-menu actions, Open link in glance and Split link in new tab, load a page-controlled link URL with the System principal instead of the originating page's principal, allowing a malicious web page to place a link to a file URL that can load with System privileges when opened through either context-menu item and bypass the content-to-file security check that blocks an ordinary click. This issue is fixed in version 1.21.5b.
CVE-2026-57501
NONEPre-NVD 0.0Trending — 4 sources updated this week
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 0%CVSS: —Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- —
- EG Score
- 0.0(none)
- EPSS
- 20.8%
- KEV
- Not listed
Published
July 9, 2026
Last Modified
July 10, 2026
References (3)
- security-advisories@githubhttps://github.com/zen-browser/desktop/commit/44f7616238208200547c7df500d945752d7b6379
- security-advisories@githubhttps://github.com/zen-browser/desktop/releases/tag/1.21.5b
- security-advisories@githubhttps://github.com/zen-browser/desktop/security/advisories/GHSA-vpvg-hp3v-rm5q
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 9× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-12 15:40 UTCEG score recompute
- 2026-07-12 05:46 UTCEPSS rescore
- 2026-07-11 08:27 UTCEPSS rescore
- 2026-07-11 08:27 UTCEPSS rescore
- 2026-07-10 22:19 UTCNVD update
- 2026-07-10 21:02 UTCMITRE cvelistV5
- 2026-07-09 23:47 UTCNVD update
- 2026-07-09 22:46 UTCEG score recompute
- 2026-07-09 22:45 UTCMITRE cvelistV5first tracked
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Same CWE
10 shownCWE-266
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- CVE-2022-4276NVD 6.3EG 9.8MEDIUM
- CVE-2022-4273NVD 7.3EG 9.8HIGH
- CVE-2022-4272NVD 6.3EG 9.8MEDIUM
- CVE-2022-4232NVD 4.7EG 9.8MEDIUM
- CVE-2022-3771NVD 6.3EG 9.8MEDIUM
- CVE-2022-3735NVD 6.3EG 9.8MEDIUM
- CVE-2022-3458NVD 6.3EG 9.8MEDIUM
Frequently asked(4)
What is CVE-2026-57501?
CVE-2026-57501 is a none vulnerability published on July 9, 2026. Zen is a firefox-based browser. Prior to 1.21.5b, Zen's glance and split-view context-menu actions, Open link in glance and Split link in new tab, load a page-controlled link URL with the System principal instead of the originating page's principal, allowing a malicious web page to place a link to…
When was CVE-2026-57501 disclosed?
CVE-2026-57501 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57501 actively exploited?
CVE-2026-57501 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2026-57501?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57501, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-57501
Is Your Infrastructure Affected by CVE-2026-57501?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.