CVE-2026-77351

LOWPre-NVD 3.53.5
EchelonGraph scoreMEDIUM confidence

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

This low-severity CVE scores 3.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (21st 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

Also known asEUVD-2026-68884 (ENISA EUVD)Source: ENISA EUVD

3.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (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: 0.3%CVSS: 3.5Exploit: No code on recordExposed services: Not assessed

The CVE record names the fixed release — apply it.

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 5.0.0, Wallos lets any authenticated user store an arbitrary SMTP host — including private and cloud-metadata IP addresses — in their personal email notification settings, with no server-side SSRF validation. When the scheduled notification cron job runs, it passes the stored host directly to PHPMailer, causing the Wallos server to open an outbound TCP connection to whatever address the attacker specified. This gives a low-privileged attacker a reliable mechanism to probe internal network services from the server's perspective. This issue has been patched in version 5.0.0.

CVSS v3
3.5
EG Score
3.5LOWmedium confidence
EG Risk
32
EG Risk 32/100

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)
Severity35% × 45%
Impact severity (EG Severity): CVSS 3.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
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 or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (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: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
21st
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 (3.5): severity, escalated by confirmed exploitation. This CVE's 3.5 is its impact severity (EG Severity), not escalated.

EG Severity
3.5 LOWCVSS-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 2026-10-29). 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 low or medium mission impact; Track* at high (mission-essential systems).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, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

The CVE record names the fixed release. Apply it within your standard update timelines.

Exploitation public PoC (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.

The score's inputs: 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

August 31, 2026

Last Modified

September 8, 2026

References (3)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 31× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-13 16:57 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  2. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  3. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  4. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  5. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  6. 2026-11-08 16:40 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  7. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  8. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  9. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  10. 2026-11-04 16:36 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  11. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  12. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  13. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  14. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  15. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  16. 2026-10-29 17:45 UTCEchelonGraph re-scored
  17. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  18. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  19. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  20. 2026-10-27 05:55 UTCOSV refresh
  21. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  22. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  23. 2026-10-25 14:01 UTCEchelonGraph re-scored
  24. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  25. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
Show 66 more
  1. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  2. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  3. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  4. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  5. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  6. 2026-10-18 03:12 UTCEchelonGraph re-scored
  7. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  8. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  9. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  10. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  11. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  12. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  13. 2026-10-12 15:37 UTCEchelonGraph re-scored
  14. 2026-10-11 19:23 UTCEchelonGraph re-scored
  15. 2026-10-11 16:39 UTCEchelonGraph re-scored
  16. 2026-10-11 13:58 UTCEchelonGraph re-scored
  17. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  18. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  19. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  20. 2026-10-09 07:40 UTCEchelonGraph re-scored
  21. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  22. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  23. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  24. 2026-10-06 07:23 UTCEchelonGraph re-scored
  25. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  26. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  27. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  28. 2026-10-03 04:06 UTCEchelonGraph re-scored
  29. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  30. 2026-09-30 03:33 UTCEchelonGraph re-scored
  31. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  32. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  33. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  34. 2026-09-26 22:54 UTCEchelonGraph re-scored
  35. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  36. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  37. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  38. 2026-09-23 22:07 UTCEchelonGraph re-scored
  39. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  40. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  41. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  42. 2026-09-20 21:57 UTCEchelonGraph re-scored
  43. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  44. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  45. 2026-09-17 21:46 UTCEchelonGraph re-scored
  46. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  47. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  48. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  49. 2026-09-14 21:35 UTCEchelonGraph re-scored
  50. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  51. 2026-09-11 21:24 UTCEchelonGraph re-scored
  52. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  53. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  54. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  55. 2026-09-08 21:12 UTCEchelonGraph re-scored
  56. 2026-09-07 14:59 UTCEchelonGraph re-scored
  57. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  58. 2026-09-04 14:49 UTCEchelonGraph re-scored
  59. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  60. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  61. 2026-09-01 14:34 UTCEchelonGraph re-scored
  62. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  63. 2026-09-01 13:42 UTCEchelonGraph re-scored
  64. 2026-08-31 22:21 UTCEchelonGraph re-scored
  65. 2026-08-31 21:25 UTCEchelonGraph re-scoredFirst assessed: 3.5 LOW
  66. 2026-08-31 21:24 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-77351?
CVE-2026-77351 is a low-severity vulnerability; its CVE record was published on August 31, 2026. Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 5.0.0, Wallos lets any authenticated user store an arbitrary SMTP host — including private and cloud-metadata IP addresses — in their personal email notification settings, with no server-side SSRF validation.…
When was the CVE record for CVE-2026-77351 published?
The CVE record for CVE-2026-77351 was published on August 31, 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 8, 2026; the record at its source may have been updated since.
Is CVE-2026-77351 actively exploited?
CVE-2026-77351 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-77351?
CVE-2026-77351 has a CVSS base score of 3.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-77351?
The CVE record for CVE-2026-77351 names the fix: "This issue has been patched in version 5.0.0."

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