BunkerWeb is an open-source, next-generation Web Application Firewall. Prior to 1.6.13, the blacklist, greylist, and antibot modules in src/common/core/blacklist/blacklist.lua, src/common/core/greylist/greylist.lua, and src/common/core/antibot/antibot.lua trust PTR suffix matches in IGNORE_RDNS, GREYLIST_RDNS, and ANTIBOT_IGNORE_RDNS without using get_ips to confirm that the hostname resolves to the client address. An unauthenticated remote attacker who controls a PTR record can spoof a trusted suffix to bypass rDNS-based blacklisting, gain greylist treatment, or skip an antibot challenge. This issue is fixed in version 1.6.13.
CVE-2026-75514
“—” beside the score: it is equal to the CVSS score beside it.
This medium-severity CVE scores 5.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (48th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Also known asEUVD-2026-63542 (ENISA EUVD)Source: ENISA EUVD
- Lower severity and no public exploit yet
A fix is available — apply it.
- CVSS v3
- 5.9
- EG Score
- 5.9MEDIUMmedium confidence
- EG Risk
- 27EG Risk 27/100
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)Severity59% × 45%Impact severity (EG Severity): CVSS 5.9 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.6% × 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
- 0.6%
- EPSS %ILE
- 48th
- 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 (5.9): severity, escalated by confirmed exploitation. This CVE's 5.9 is its impact severity (EG Severity), not escalated.
- EG Severity
- 5.9 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
- 0.6% 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, and whom BOD 26-04 binds: 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.
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 20, 2026
Last Modified
October 18, 2026
Advisory Details (4)
Auto-updated Aug 20, 2026v1.6.13
Patch available: bunkerity/bunkerweb v1.6.13
https://github.com/bunkerity/bunkerweb/releases/tag/v1.6.13commit 1a97e5b3f977 (bunkerity/bunkerweb)
Fix landed in bunkerity/bunkerweb commit 1a97e5b3f977 — awaiting tagged release
https://github.com/bunkerity/bunkerweb/commit/1a97e5b3f977130a1b84507a9e1f703c8eec12ebMerge branch "dev" into branch "staging"
Fix merged in bunkerity/bunkerweb PR #3710 on 2026-07-10 — awaiting tagged release
https://github.com/bunkerity/bunkerweb/pull/3710rDNS bypass via missing forward-confirmation (FCrDNS) in blacklist, greylist, whitelist and antibot · Advisory · bunkerity/bunkerweb · GitHub
https://github.com/bunkerity/bunkerweb/security/advisories/GHSA-q54j-5484-pvjmWeakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 44× 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 98 of 119 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. 2 repeat rows among the latest 100 are merged into the row they repeat. The 21 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-28 04:25 UTCOSV refresh
- 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-25 14:02 UTCEG score recompute
- 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-18 20:36 UTCEG score recompute
- 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-18 03:13 UTCEG score recompute
- 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.6% · 47th percentile
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- 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-12 15:39 UTCEG score recompute
- 2026-10-11 19:24 UTCEG score recompute
- 2026-10-11 16:40 UTCEG score recompute
- 2026-10-11 13:59 UTCEG score recompute
- 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-09 08:22 UTCEG score recompute
- 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-08 05:18 UTCEG score recompute
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 46th percentile
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- 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.6% · 46th percentile
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- 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 46th percentile
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- 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 46th percentile
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- 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-03 05:09 UTCEG score recompute
- 2026-10-02 06:49 UTCEG score recompute
- 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-01 06:32 UTCEG score recompute
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- 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-28 23:40 UTCEG score recompute
- 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-28 01:19 UTCEG score recompute
- 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-27 02:59 UTCEG score recompute
- 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-25 08:43 UTCEG score recompute
- 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.6% · 46th percentile
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- 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.5% · 39th percentile
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- 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-19 18:40 UTCEG score recompute
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- 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-18 11:31 UTCEG score recompute
- 2026-09-16 14:22 UTCEG score recompute
- 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-09-15 15:13 UTCEG score recompute
- 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-09-13 18:15 UTCEG score recompute
- 2026-09-12 19:55 UTCEG score recompute
- 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-09-11 21:35 UTCEG score recompute
- 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-09-10 23:15 UTCEG score recompute
- 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-09-09 01:55 UTCEG score recompute
- 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-09-06 14:32 UTCEG score recompute
- 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-09-05 16:12 UTCEG score recompute
- 2026-09-04 17:52 UTCEG score recompute
- 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-09-02 21:09 UTCEG score recompute
- 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-09-01 21:55 UTCEG score recompute
- 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-08-31 01:15 UTCEG score recompute
- 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
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Frequently asked(5)
What is CVE-2026-75514?
When was the CVE record for CVE-2026-75514 published?
Is CVE-2026-75514 actively exploited?
What is the CVSS score of CVE-2026-75514?
How do I remediate CVE-2026-75514?
Dependency Blast Radius
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