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CVE-2026-28318

SolarWinds Serv-U is susceptible to specially crafted POST requests that crash the Serv-U service without authentication using Content-Encoding: deflate. Mitigation steps are provided to secure customer environments in the SolarWinds Trust Center if you are unable to deploy the update
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:13786332c443607c2bfc24575ad0ce7fd6cdf341820a3e9c37b0233153e0cc1e
Known exploited
CISA KEV
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","platforms":["Windows","Linux"],"product":"Serv-U","vendor":"SolarWinds","versions":[{"status":"affected","version":"15.5.4 and previous versions"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:3a96f7e9ee606475d9e0c0894ff90b87d981f55d0d1df34959a4af8cbe8d4648 · sha256:93e7ab5f09af9f7f… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:3a96f7e9ee606475d9e0c0894ff90b87d981f55d0d1df34959a4af8cbe8d4648 · sha256:93e7ab5f09af9f7f… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-400","description":"CWE-400 Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:3a96f7e9ee606475d9e0c0894ff90b87d981f55d0d1df34959a4af8cbe8d4648 · sha256:93e7ab5f09af9f7f… · /containers/cna/problemTypes/0/descriptions/0

Known exploitation assertions

2 source assertions
{"cwes":["CWE-400"],"dateAdded":"2026-06-05","dueDate":"2026-06-19","knownRansomwareCampaignUse":"Unknown","notes":"https://www.solarwinds.com/trust-center/security-advisories/cve-2026-28318 ; https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-5-4-hotfix-1_release_notes.htm#link7 ; https://nvd.nist.gov/vuln/detail/CVE-2026-28318","product":"Serv-U","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","shortDescription":"Sol…
  • cisa_kev_jsonknown_exploited
    urn:baitaphish:normalized-source-record:v2:c6dccfbdead8396f430680d58c2a069766ddfedebaecf1c7574daa200f129dfc · sha256:635dff916c4092c0… · /vulnerabilities/48
    Open source location →
{"cwes":["CWE-400"],"dateAdded":"2026-06-05","dueDate":"2026-06-19","knownRansomwareCampaignUse":"Unknown","notes":"https://www.solarwinds.com/trust-center/security-advisories/cve-2026-28318 ; https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-5-4-hotfix-1_release_notes.htm#link7 ; https://nvd.nist.gov/vuln/detail/CVE-2026-28318","product":"Serv-U","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","shortDescription":"Sol…
  • cisa_kev_jsonknown_exploited
    urn:baitaphish:normalized-source-record:v2:277ee4348ea07fb05bd2a2c780f29c89cbb02af237b5c4ea660623c844e9cd72 · sha256:16acee8334e59e44… · /vulnerabilities/45
    Open source location →

Source references

3 source assertions
{"url":"https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-5-4-hotfix-1_release_notes.htm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3a96f7e9ee606475d9e0c0894ff90b87d981f55d0d1df34959a4af8cbe8d4648 · sha256:93e7ab5f09af9f7f… · /containers/cna/references/1
{"tags":["government-resource"],"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-28318"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3a96f7e9ee606475d9e0c0894ff90b87d981f55d0d1df34959a4af8cbe8d4648 · sha256:93e7ab5f09af9f7f… · /containers/adp/0/references/0
{"url":"https://www.solarwinds.com/trust-center/security-advisories/CVE-2026-28318"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3a96f7e9ee606475d9e0c0894ff90b87d981f55d0d1df34959a4af8cbe8d4648 · sha256:93e7ab5f09af9f7f… · /containers/cna/references/0

Attribution and limitations

  • CISA Known Exploited Vulnerabilities JSON: CISA named for provenance; do not use CISA/DHS marks or imply endorsement Source →
  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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