Unknown baddies are abusing yet another critical Microsoft SharePoint bug to compromise victims’ SharePoint servers, the US government warned.
CVE-2026-20963 is a critical deserialization flaw in SharePoint that allows unauthenticated attackers to remotely execute code on the server without any user interaction, and Redmond fixed the issue as part of its January Patch Tuesday. At the time, the vulnerability was neither publicly known nor exploited, according to Microsoft, which deemed exploitation “less likely.” Fast forward to Wednesday when the US Cybersecurity and Infrastructure Agency added CVE-2026-20963 to its Known Exploited Vulnerabilities (KEV) catalog, gave federal agencies just three days to issue a patch..
Read more…
Source: The Register News
Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox
Related:
- macOS malware used run-only AppleScripts to avoid detection for five years
January 12, 2021
For more than five years, macOS users have been the targets of a sneaky malware operation that used a clever trick to avoid detection and hijacked the hardware resources of infected users to mine cryptocurrency behind their backs. Named OSAMiner, the malware has been distributed in the wild since at least 2015 disguised in pirated (cracked) ...
- New Zealand Reserve Bank breached using bug patched on Xmas Eve
January 12, 2021
A recent data breach at the Reserve Bank of New Zealand, known as Te Pūtea Matua, was caused by attackers exploiting a critical vulnerability patched the same day. Over the weekend, the Reserve Bank disclosed that they suffered a data breach after an attacker hacked a third-party file sharing service containing sensitive data. In a new advisory ...
- Mimecast Certificate Hacked in Microsoft Email Supply-Chain Attack
January 12, 2021
A Mimecast-issued certificate used to authenticate some of the company’s products to Microsoft 365 Exchange Web Services has been “compromised by a sophisticated threat actor,” the company has announced. Mimecast provides email security services that customers can apply to their Microsoft 365 accounts by establishing a connection to Mimecast’s servers. The certificate in question is used ...
- New Sunspot malware found while investigating SolarWinds hack
January 12, 2021
Cybersecurity firm CrowdStrike has discovered the malware used by the SolarWinds hackers to inject backdoors in Orion platform builds during the supply-chain attack that led to the compromise of several companies and government agencies. Sunspot, as it was dubbed by CrowdStrike, was dropped by the attackers in the development environment of SolarWinds’ Orion IT management software. After ...
- Capitol attack’s cybersecurity fallout: Stolen laptops, lost data and possible espionage
January 11, 2021
When hostile actors penetrated the Capitol Building on January 6, they gained access to individual chambers and offices and remained at large within the Capitol complex for well over two hours. We have reports that items were stolen. One report comes from acting US Attorney for DC, Michael Sherwin, who stated “items, electronic items were stolen ...
- Malicious Shell Script Steals AWS, Docker Credentials
January 8, 2021
We recently spotted new attacks where, again, threat actors used shell scripts to perform their malicious activities. Based on previous attacks, these malicious scripts were typically used to deploy cryptocurrency miners. But recent cases involving these fresh samples highlighted how the scripts are developed, as they now serve other purposes besides being downloaders for cryptominers. Based ...