CVE-2019-9535

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-24. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A vulnerability exists in the way that iTerm2 integrates with tmux's control mode, which may allow an attacker to execute arbitrary commands by providing malicious output to the terminal. This affects versions of iTerm2 up to and including 3.3.5. This vulnerability may allow an attacker to execute arbitrary commands on their victim's computer by providing malicious output to the terminal. It could be exploited using command-line utilities that print attacker-controlled content.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
83%
KEV
Not listed

Published

October 9, 2019

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Jul 3, 2026
🔬 Proof of concept available. No patch confirmed yet. Sources: cert.
cert

VU#763073 - iTerm2 with tmux integration is vulnerable to remote command execution

https://kb.cert.org/vuls/id/763073/
generic

Redirecting to Google Groups

https://groups.google.com/forum/#%21topic/iterm2-discuss/57k_AuLdQa4
generic🟡 PoC Available

Critical Security Issue identified in iTerm2 as part of Mozilla Open Source Audit - Mozilla Security Blog

https://blog.mozilla.org/security/2019/10/09/iterm2-critical-issue-moss-audit/

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 45× 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.

Showing the most recent 100 of 106 total refreshes for this CVE.

  1. 2026-07-26 14:51 UTCEPSS rescore
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  43. 2026-06-14 16:43 UTCOSV refresh
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  74. 2026-05-27 13:38 UTCEPSS rescore
  75. 2026-05-27 13:13 UTCEG score recompute

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Frequently asked(5)

What is CVE-2019-9535?
CVE-2019-9535 is a critical vulnerability published on October 9, 2019. A vulnerability exists in the way that iTerm2 integrates with tmux's control mode, which may allow an attacker to execute arbitrary commands by providing malicious output to the terminal. This affects versions of iTerm2 up to and including 3.3.5. This vulnerability may allow an attacker to execute…
When was CVE-2019-9535 disclosed?
CVE-2019-9535 was first published in the National Vulnerability Database on October 9, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-9535 actively exploited?
CVE-2019-9535 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 17.1% of all scored CVEs.
What is the CVSS score of CVE-2019-9535?
CVE-2019-9535 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2019-9535?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-9535, 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.

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