CVE-2015-5621
A public proof of concept exists; no exploitation attested.
- Published2015-08-19
- WeaknessCWE-19 · CWE-190
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
The snmp_pdu_parse function in snmp_api.c in net-snmp 5.7.2 and earlier does not remove the varBind variable in a netsnmp_variable_list item when parsing of the SNMP PDU fails, which allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted packet.
Timeline
dates in UTC- 2015-08-1915:59CVE publishedNVD
- 2026-10-2319:23EPSS crossed 10 %FIRST EPSS
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2015-5621?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2015-5621?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.7 | ≤ 5.7.2 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
Silex Technology SD-330AC and AMC Manager
Silex Technology SD-330AC: <=1.42 · Silex Technology AMC Manager: <=5.0.2
Fix
- Vendor fix CISA ICSA-26-111-10 · 1 productThe developer has released the following versions to address this vulnerability: SD-330AC firmware Ver 1.50 or later
- Vendor fix CISA ICSA-26-111-10 · 1 productAMC Manager Ver.5.1.0 or later
- Mitigation from the vendor CISA ICSA-26-111-10 · 2 productsCVE-2015-5621: Disable SNMP service.
- Mitigation from the vendor CISA ICSA-26-111-10 · 2 productsFor more information, see Silex Technology's security advisory in English (https://www.silex.jp/support/security-advisories/en/2026-001) or in Japanese (https://www.silex.jp/support/security-advisories/2026-001).
- Mitigation from the vendor CISA ICSA-26-111-10 · 2 productsFor more information, see JPCERT/CC vulnerability notes in English (https://jvn.jp/en/vu/JVNVU94271449/) or in Japanese (https://jvn.jp/vu/JVNVU94271449/).
Detection
read 2026-10-23 19:23 UTC- Nuclei template
- none so far ProjectDiscovery
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- CISA-ADPSSVC decisionpoc2025-12-04
- OpenCVESSVC decisionpoc—
- CISA-ADPCVSS 3.17.52025-12-04
- NVDCVSS 2.07.5read 2026-10-23
- CISA-ADPweakness (CWE)CWE-1902025-12-04
- NVDweakness (CWE)CWE-19read 2026-10-23
- FIRST EPSSEPSS score38.3 %read 2026-10-23
- Exploit-DBdetectionread 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2015-08-19
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2015-5621?
Is CVE-2015-5621 actively exploited?
What is the CVSS score for CVE-2015-5621?
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Related vulnerabilities
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