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CVE detail

CVE-2021-20016

A SQL-Injection vulnerability in the SonicWall SSLVPN SMA100 product allows a remote unauthenticated attacker to perform SQL query to access username password and other session related information. This vulnerability impacts SMA100 build version 10.x.

CVSS 9.8 · CriticalBuzz score 71.9KEV listed

Buzz score

Why this CVE is surfacing

Buzz score total 71.9

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 29.4 · diversity 17.5 · KEV 25.0 · OTX 0.0 · PoC 0.0
Mention score
29.4
18 evidence mentions in the snapshot
Diversity score
17.5
7 sources across 2 categories
KEV score
25.0
Known exploited vulnerability present
OTX score
0.0
0 OTX pulses
PoC score
0.0
0 repos · best confidence N/A
Best PoC traction
0
Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions
1
within the 30d window
Peak daily
1
highest bucket

Evidence

Source links by recency

Newest mentions first
18 source links · newest first
  • es secure remote access appliances which may have been chained for unauthenticated remote code execution. Key takeaways CVE-2026-15409 and CVE-2026-15410 are a pair of exploited vulnerabilities that may have been chained together to allow for code execution on SonicWall SMA1000 series appliances. Zero-day exploitation of these vulnerabilities has been

    vendorwww.tenable.comJul 15, 2026, 5:14 PM
  • Once the staple for securing employees working remotely, VPNs were designed to provide secure access to corporate data and systems for a small percentage of a workforce while the majority worked within traditional office confines. The move to mass remote working brought about by COVID-19 in early 2020 changed things dramatically. Since then, large numbers […]

    newswww.csoonline.comNov 26, 2024, 7:00 AM
  • A medical company has been fined $450,000 by the New York AG over a data breach that may have involved exploitation of a SonicWall vulnerability.

    newswww.securityweek.comNov 9, 2023, 3:33 PM
  • A threat actor has leaked the source code for the first version of the HelloKitty ransomware on a Russian-speaking cybercrime forum. Cybersecurity researchers 3xp0rt reported that a threat actor that goes online with the moniker ‘kapuchin0’ (and also uses the alias Gookee) has leaked the source code of the HelloKitty ransomware on the XSS forum. kapuchin0 claims […]

    newssecurityaffairs.comOct 9, 2023, 1:45 PM
  • Ransomware cases worked by Unit 42 consultants in the first six months of 2021 reveal insights into the preferred tactics of REvil threat actors.

    vendorunit42.paloaltonetworks.comJun 3, 2022, 8:00 PM
  • Ivanti, Cyber Security Works and Cyware announced a report which identified 32 new ransomware families in 2021, bringing the total to 157 and representing a 26% increase over the previous year. The report also found that these ransomware groups are continuing to target unpatched vulnerabilities and weaponize zero-day vulnerabilities in record time to instigate crippling attacks. At the same time, they are broadening their attack spheres and finding newer ways to compromise organizational networks and … More →

    newswww.helpnetsecurity.comJan 28, 2022, 6:00 AM
  • While investigating a data breach suffered by a healthcare organization, FBI accidentally revealed that it believes that the HelloKitty ransomware gang operates out of Ukraine. The investigation conducted by FBI on a recent data breach suffered by an Oregon healthcare organization lead to the accidental revelation that the FBI believes that the HelloKitty ransomware gang […]

    newssecurityaffairs.comDec 15, 2021, 8:16 PM
  • The Federal Bureau of Investigation (FBI) has published a flash alert to share details on the tactics, techniques and procedures (TTPs) and indicators of compromise (IOCs) associated with the Hello Kitty ransomware, which is also known as FiveHands.

    newswww.securityweek.comNov 2, 2021, 3:59 PM
  • The US FBI has published a flash alert warning private organizations of the evolution of the HelloKitty ransomware (aka FiveHands). The U.S. Federal Bureau of Investigation (FBI) has sent out a flash alert warning private industry of a new feature of the HelloKitty ransomware gang (aka FiveHands). According to the alert, the ransomware gang is […]

    newssecurityaffairs.comNov 1, 2021, 6:47 PM
  • BleepingComputer became aware that the recent wave of attacks targeting vulnerable SonicWall devices was carried out by HelloKitty ransomware operators. SonicWall this week has issued an urgent security alert to warn companies of “an imminent ransomware campaing” targeting some of its equipment that reached end-of-life (EoL). Threat actors could target unpatched devices belonging to Secure Mobile Access […]

    newssecurityaffairs.comJul 18, 2021, 8:46 AM
  • U.S. CISA has published an analysis of the FiveHands ransomware, the same malware that was analyzed a few days ago by researchers from FireEye’s Mandiant experts. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has published an analysis of the FiveHands ransomware that was recently detailed by FireEye’s Mandiant. At the end of April, researchers […]

    newssecurityaffairs.comMay 9, 2021, 6:12 PM
  • 3rd May – Threat Intelligence ReportCheck Point Research

    For the latest discoveries in cyber research for the week of 3rd May, please download our Threat Intelligence Bulletin. Top Attacks and Breaches Elekta, a Swedish provider of oncology and radiology systems, has suffered a ransomware attack that led to the takedown of its cloud storage systems. The attack caused disruptions and delays in the […]

    vendorresearch.checkpoint.comMay 3, 2021, 2:40 PM
  • UNC2447 cybercrime gang exploited a zero-day in the Secure Mobile Access (SMA), addressed by SonicWall earlier this year, before the vendor released a fix. Researchers from FireEye’s Mandiant revealed that a sophisticated cybercrime gang tracked as UNC2447 has exploited a zero-day issue (CVE-2021-20016) in SonicWall Secure Mobile Access (SMA) devices, fixed earlier this year, before […]

    newssecurityaffairs.comApr 30, 2021, 4:25 PM
  • A zero-day vulnerability addressed by SonicWall in its Secure Mobile Access (SMA) appliances earlier this year was exploited by a sophisticated and aggressive cybercrime group before the vendor released a patch, FireEye’s Mandiant unit reported on Thursday.

    newswww.securityweek.comApr 30, 2021, 2:03 PM
  • Security provider SonicWall released a new firmware update for an SMA-100 zero-day vulnerability that was exploited in attacks. SonicWall has released a second firmware update for the SMA-100 zero-day vulnerability that was exploited in attacks in the wild. SonicWall disclosed a security breach on January 22, it blamed sophisticated threat actors for the intrusion. On January, 29 […]

    newssecurityaffairs.comFeb 20, 2021, 4:42 PM
  • 8th February – Threat Intelligence ReportCheck Point Research

    For the latest discoveries in cyber research for the week of 8th February, please download our Threat Intelligence Bulletin. Top Attacks and Breaches Check Point Research have collaborated in a research investigating the renewed activity and toolset of ‘Infy’, an Iranian APT active since 2007. Infy’s targets are found mostly in Sweden, the Netherlands and […]

    vendorresearch.checkpoint.comFeb 8, 2021, 5:01 PM
  • SonicWall has released a security patch to address the zero-day flaw actively exploited in attacks against the SMA 100 series appliances. SonicWall this week released firmware updates (version 10.2.0.5-29sv) to address an actively exploited zero-day vulnerability in Secure Mobile Access (SMA) 100 series appliances. The vulnerability, tracked as CVE-2021-20016, has been rated as critical and received a […]

    newssecurityaffairs.comFeb 4, 2021, 1:57 PM
  • SonicWall on Wednesday announced that it released firmware updates for its Secure Mobile Access (SMA) 100 series appliances to patch an actively exploited zero-day vulnerability.

    newswww.securityweek.comFeb 4, 2021, 12:15 PM

Exploit code

Public exploit repository references

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Related records

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