CVE-2026-40082

MEDIUMPre-NVD 5.45.4
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (24th 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

Also known asEUVD-2026-39586 (ENISA EUVD)Source: ENISA EUVD

5.4EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have missing session_regenerate_id() after login, leading to Session Fixation. session_regenerate_id() is NOT called after successful login. The login flow at auth_login.php:203-207 directly sets $_SESSION[SESS_USER_ID] without rotating the session ID. The session cookie configuration is otherwise good (httponly=true, samesite=Strict, secure=true for HTTPS at include/global.php:513-537), but these do not prevent session fixation via same-site vectors. This issue has been fixed in version 1.2.31.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity54% × 45%
Impact severity (EG Severity): CVSS 5.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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.
EPSS PROB
0.3%
EPSS %ILE
24th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (5.4): severity, escalated by confirmed exploitation. This CVE's 5.4 is its impact severity (EG Severity), not escalated.

EG Severity
5.4 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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)60 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 partial (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

June 25, 2026

Last Modified

June 29, 2026

Advisory Details (2)

Auto-updated Jun 25, 2026
Patch available. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)

Session Fixation via missing session_regenerate_id() after login · Advisory · Cacti/cacti · GitHub

https://github.com/Cacti/cacti/security/advisories/GHSA-273r-qr93-wgcp
GitHub commit Patch Available

commit 2fa404e70a57 (Cacti/cacti)

Patch available: Cacti/cacti release/1.2.31 (contains commit 2fa404e70a57)

https://github.com/Cacti/cacti/commit/2fa404e70a5702be10682555911228e8e51ba198

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
cacti1.2.16+ds1-2 ... 1.2.31+ds1-2 (31 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
cacti1.2.24+ds1-1 ... 1.2.31+ds1-4 (22 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
cacti1.2.30+ds1-1 ... 1.2.31+ds1-4 (7 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
cacti1.2.30+ds1-1, 1.2.30+ds1-2, 1.2.30+ds1-3
  • every version up to 1.2.31+ds1-1: fixed in 1.2.31+ds1-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 37× 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.

Showing the most recent 99 of 159 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 60 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  2. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  3. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  4. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  5. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  6. 2026-10-25 14:31 UTCEG score recompute
  7. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  8. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  9. 2026-10-23 02:39 UTCEG score recompute
  10. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  11. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  12. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  13. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  14. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  15. 2026-10-18 03:43 UTCEG score recompute
  16. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  17. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  18. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  19. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  20. 2026-10-13 21:54 UTCOSV refresh
  21. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  22. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  23. 2026-10-12 16:09 UTCEG score recompute
  24. 2026-10-11 19:52 UTCEG score recompute
  25. 2026-10-11 17:05 UTCEG score recompute
Show 74 more
  1. 2026-10-11 14:32 UTCEG score recompute
  2. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  3. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  4. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  5. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  6. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  7. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  8. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  9. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  10. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  11. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  12. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  13. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  14. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  15. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  16. 2026-09-23 08:23 UTCEG score recompute
  17. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  18. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  19. 2026-09-18 07:18 UTCEG score recompute
  20. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  21. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  22. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  23. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  24. 2026-09-14 01:16 UTCEG score recompute
  25. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  26. 2026-09-12 15:41 UTCEG score recompute
  27. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  28. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  29. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  30. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  31. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  32. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  33. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  34. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  35. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  36. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  37. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  38. 2026-08-30 19:27 UTCEG score recompute
  39. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  40. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  41. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  42. 2026-08-27 23:15 UTCEG score recompute
  43. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  44. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  45. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  46. 2026-08-24 13:07 UTCEG score recompute
  47. 2026-08-23 09:30 UTCEG score recompute
  48. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  49. 2026-08-22 09:53 UTCEG score recompute
  50. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  51. 2026-08-21 06:37 UTCEG score recompute
  52. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  53. 2026-08-20 07:00 UTCEG score recompute
  54. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  55. 2026-08-19 01:12 UTCEG score recompute
  56. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  57. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  58. 2026-08-16 18:21 UTCEG score recompute
  59. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  60. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  61. 2026-08-15 18:25 UTCEG score recompute
  62. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  63. 2026-08-14 18:47 UTCEG score recompute
  64. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  65. 2026-08-12 19:31 UTCEG score recompute
  66. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  67. 2026-08-11 19:54 UTCEG score recompute
  68. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  69. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  70. 2026-08-09 20:39 UTCEG score recompute
  71. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  72. 2026-08-08 21:02 UTCEG score recompute
  73. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  74. 2026-08-07 21:25 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-40082?
CVE-2026-40082 is a medium-severity vulnerability; its CVE record was published on June 25, 2026. Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have missing sessionregenerateid() after login, leading to Session Fixation. sessionregenerateid() is NOT called after successful login. The login flow at authlogin.php:203-207 directly sets…
When was the CVE record for CVE-2026-40082 published?
The CVE record for CVE-2026-40082 was published on June 25, 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 June 29, 2026; the record at its source may have been updated since.
Is CVE-2026-40082 actively exploited?
CVE-2026-40082 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (24th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-40082?
CVE-2026-40082 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-40082?
A fix for CVE-2026-40082 is available: update to the fixed version the vendor names in its advisory.

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