CVE-2026-53542

HIGHPre-NVD 8.88.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 8.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7% (50th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated
8.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 8.8Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. Prior to 2.3.2, the archive creation endpoint in src/backend/ssh/file-manager.ts passes selected file basenames to tar without an end-of-options marker and without making the operands unambiguously relative. A user with access to an SSH file-manager session can select basenames beginning with GNU tar options such as --checkpoint=1 and --checkpoint-action=exec, causing tar, tar.gz, tar.bz2, or tar.xz creation to interpret those names as options. The resulting checkpoint action executes commands on the managed SSH host with the privileges of the connected SSH account, allowing file disclosure, modification, and service disruption. This issue is fixed in version 2.3.2.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
56
EG Risk 56/100

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 (value × EchelonGraph’s weight)
Severity88% × 45%
The EG Score, 8.8 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.7%
EPSS %ILE
50th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 19, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Aug 19, 2026
Patch available. Sources: github, github_pr, github_release.
GitHub release Patch Available

release-2.3.2

Patch available: Termix-SSH/Termix release-2.3.2-tag

https://github.com/Termix-SSH/Termix/releases/tag/release-2.3.2-tag
GitHub pull request

v2.3.2

Fix merged in Termix-SSH/Termix PR #874 on 2026-06-04 — awaiting tagged release

https://github.com/Termix-SSH/Termix/pull/874
GitHub advisoryMentions a patch (unverified)

Tar option injection in file-manager archive creation allows command execution on managed SSH hosts · Advisory · Termix-SSH/Termix · GitHub

https://github.com/Termix-SSH/Termix/security/advisories/GHSA-rwj6-6vh7-45pv

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 48× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  3. 2026-10-12 15:57 UTCEG score recompute
  4. 2026-10-11 19:40 UTCEG score recompute
  5. 2026-10-11 16:55 UTCEG score recompute
  6. 2026-10-11 14:19 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  11. 2026-10-08 06:27 UTCEG score recompute
  12. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  13. 2026-10-06 16:57 UTCEG score recompute
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  15. 2026-10-06 03:46 UTCEG score recompute
  16. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  17. 2026-10-05 09:47 UTCEG score recompute
  18. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  19. 2026-10-03 16:53 UTCEG score recompute
  20. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  21. 2026-10-03 00:41 UTCEG score recompute
  22. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  23. 2026-10-01 22:45 UTCEG score recompute
  24. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  25. 2026-09-30 20:59 UTCEG score recompute
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  1. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  2. 2026-09-30 08:36 UTCEG score recompute
  3. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  4. 2026-09-28 21:41 UTCEG score recompute
  5. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  6. 2026-09-27 16:48 UTCEG score recompute
  7. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  8. 2026-09-27 04:25 UTCEG score recompute
  9. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  10. 2026-09-24 15:50 UTCEG score recompute
  11. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  12. 2026-09-24 03:25 UTCEG score recompute
  13. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  14. 2026-09-23 02:38 UTCEG score recompute
  15. 2026-09-22 01:51 UTCEG score recompute
  16. 2026-09-19 23:09 UTCEG score recompute
  17. 2026-09-18 22:16 UTCEG score recompute
  18. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  19. 2026-09-17 21:28 UTCEG score recompute
  20. 2026-09-16 20:05 UTCEG score recompute
  21. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  22. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  23. 2026-09-15 04:07 UTCEG score recompute
  24. 2026-09-14 03:20 UTCEG score recompute
  25. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  26. 2026-09-13 02:16 UTCEG score recompute
  27. 2026-09-12 01:28 UTCEG score recompute
  28. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  29. 2026-09-11 13:05 UTCEG score recompute
  30. 2026-09-10 12:19 UTCEG score recompute
  31. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  32. 2026-09-09 02:21 UTCEG score recompute
  33. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  34. 2026-09-08 04:01 UTCEG score recompute
  35. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  36. 2026-09-06 14:32 UTCEG score recompute
  37. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  38. 2026-09-06 02:09 UTCEG score recompute
  39. 2026-09-05 01:22 UTCEG score recompute
  40. 2026-09-04 12:58 UTCEG score recompute
  41. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  42. 2026-09-02 23:36 UTCEG score recompute
  43. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  44. 2026-09-01 22:48 UTCEG score recompute
  45. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  46. 2026-09-01 10:24 UTCEG score recompute
  47. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  48. 2026-08-30 21:15 UTCEG score recompute
  49. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  50. 2026-08-30 08:51 UTCEG score recompute
  51. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  52. 2026-08-29 08:00 UTCEG score recompute
  53. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  54. 2026-08-27 15:56 UTCEG score recompute
  55. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  56. 2026-08-26 15:08 UTCEG score recompute
  57. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  58. 2026-08-26 02:45 UTCEG score recompute
  59. 2026-08-25 14:21 UTCEG score recompute
  60. 2026-08-25 14:15 UTCEG score recompute
  61. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  62. 2026-08-25 01:13 UTCEG score recompute
  63. 2026-08-24 12:50 UTCEG score recompute
  64. 2026-08-23 12:02 UTCEG score recompute
  65. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  66. 2026-08-22 11:16 UTCEG score recompute
  67. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  68. 2026-08-21 10:29 UTCEG score recompute
  69. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  70. 2026-08-19 21:19 UTCEG score recompute
  71. 2026-08-19 20:38 UTCEG score recomputeFirst assessed: 8.8 HIGH
  72. 2026-08-19 20:37 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-53542?
CVE-2026-53542 is a high-severity vulnerability; its CVE record was published on August 19, 2026. Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. Prior to 2.3.2, the archive creation endpoint in src/backend/ssh/file-manager.ts passes selected file basenames to tar without an end-of-options marker and without making the operands…
When was the CVE record for CVE-2026-53542 published?
The CVE record for CVE-2026-53542 was published on August 19, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 9, 2026; the record at its source may have been updated since.
Is CVE-2026-53542 actively exploited?
CVE-2026-53542 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (50th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-53542?
CVE-2026-53542 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-53542?
A fix for CVE-2026-53542 is available: update to the fixed version the vendor names in its advisory.

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